The Cobblestone Collection trade-ups
The Cobblestone Collection has 5 legal trade-up contracts, from Consumer Grade up to Covert. The cheapest today is ten UMP-45 | Indigo in Battle-Scarred at €1.33 each, a €13.30 ticket, for one of 4 Industrial Grade skins at 25.00% each. Those ten land the outcomes in Minimal Wear to Battle-Scarred. Asks read 2026-09-26.
The cheapest legal contract, worked through
Ten copies of UMP-45 | Indigo in Battle-Scarred at €1.33 each make the cheapest Consumer Grade contract here: €13.30 in, one Industrial Grade skin out. The cheapest Battle-Scarred copy sits at the worst float of its band, 0.8, which is 100 percent of the way up that skin's own range, and that position, not the raw float, is what maps into each outcome's range. At that float the outcomes land in Minimal Wear to Battle-Scarred.
Priced at those wears, none of the 4 outcomes we can quote nets more than the €13.30 ticket after the venue's fee. They run from €5.01 to €12.82.
That's the calculator's arithmetic on the cheapest listing, not a pick; price your own ten in the trade-up calculator.
Consumer Grade to Industrial Grade
Ten Consumer Grade skins from The Cobblestone Collection return one of 4 Industrial Grade skins, each at 25.00%, when all ten come from here.
Cheapest ticket: ten UMP-45 | Indigo in Battle-Scarred, €13.30. Inputs run from UMP-45 | Indigo at €1.33 to Dual Berettas | Briar at €1.58. Where the cheapest ten land, MAG-7 | Silver nets the most, €12.82, and USP-S | Royal Blue the least, €5.01. No StatTrak contract on this step: the versions aren't there on both sides.
| Consumer Grade input | Cheapest ask | Wear | Float range |
|---|---|---|---|
 UMP-45 | Indigo | €1.33 | BS | 0.06 to 0.80 |
 MAC-10 | Indigo | €1.38 | FT | 0.06 to 0.80 |
 P90 | Storm | €1.39 | FT | 0.06 to 0.80 |
 SCAR-20 | Storm | €1.39 | FT | 0.06 to 0.80 |
 Dual Berettas | Briar | €1.58 | MW | 0.00 to 0.22 |
Free account, one click through Steam. You come straight back here with every row open, and your own inventory priced per copy.
On Steam's own page. We never receive your Steam password or touch your skins.
The button opens steamcommunity.com, so check the address bar. Steam may ask for your password there; it never reaches us. Steam only tells us your public ID. Read-only: we can't trade, sell or move a single item. Free, no card.
Open this page in Safari or Chrome before signing in through Steam.
| Industrial Grade outcome | Chance | Lands at | Net there |
|---|---|---|---|
 MAG-7 | Silver | 25.00% | MW 0.08 | €12.82 |
 Nova | Green Apple | 25.00% | FT 0.3 | €8.77 |
 Sawed-Off | Rust Coat | 25.00% | BS 0.8 | €7.73 |
 USP-S | Royal Blue | 25.00% | BS 0.8 | €5.01 |
Free account, one click through Steam. You come straight back here with every row open, and your own inventory priced per copy.
On Steam's own page. We never receive your Steam password or touch your skins.
The button opens steamcommunity.com, so check the address bar. Steam may ask for your password there; it never reaches us. Steam only tells us your public ID. Read-only: we can't trade, sell or move a single item. Free, no card.
Open this page in Safari or Chrome before signing in through Steam.
Industrial Grade to Mil-Spec Grade
Ten Industrial Grade skins from The Cobblestone Collection return one of 2 Mil-Spec Grade skins, each at 50.00%, when all ten come from here.
Cheapest ticket: ten USP-S | Royal Blue in Field-Tested, €55.10. Inputs run from USP-S | Royal Blue at €5.51 to MAG-7 | Silver at €11.41. Where the cheapest ten land, P2000 | Chainmail nets the most, €42.94, and MP9 | Dark Age the least, €35.26. No StatTrak contract on this step: the versions aren't there on both sides.
| Industrial Grade input | Cheapest ask | Wear | Float range |
|---|---|---|---|
| USP-S | Royal Blue | €5.51 | FT | 0.06 to 0.80 |
| Sawed-Off | Rust Coat | €5.80 | FT | 0.00 to 0.80 |
| Nova | Green Apple | €7.19 | FT | 0.00 to 0.30 |
| MAG-7 | Silver | €11.41 | FN | 0.00 to 0.08 |
Free account, one click through Steam. You come straight back here with every row open, and your own inventory priced per copy.
On Steam's own page. We never receive your Steam password or touch your skins.
The button opens steamcommunity.com, so check the address bar. Steam may ask for your password there; it never reaches us. Steam only tells us your public ID. Read-only: we can't trade, sell or move a single item. Free, no card.
Open this page in Safari or Chrome before signing in through Steam.
| Mil-Spec Grade outcome | Chance | Lands at | Net there |
|---|---|---|---|
 MP9 | Dark Age | 50.00% | MW 0.095135 | €35.26 |
 P2000 | Chainmail | 50.00% | MW 0.095135 | €42.94 |
Mil-Spec Grade to Restricted
Ten Mil-Spec Grade skins from The Cobblestone Collection return one of 2 Restricted skins, each at 50.00%, when all ten come from here.
Cheapest ticket: ten MP9 | Dark Age in Minimal Wear, €351. Inputs run from MP9 | Dark Age at €35.08 to P2000 | Chainmail at €37.45. Where the cheapest ten land, Desert Eagle | Hand Cannon nets the most, €347, and CZ75-Auto | Chalice the least, €273. No StatTrak contract on this step: the versions aren't there on both sides.
| Mil-Spec Grade input | Cheapest ask | Wear | Float range |
|---|---|---|---|
| MP9 | Dark Age | €35.08 | MW | 0.00 to 0.22 |
| P2000 | Chainmail | €37.45 | FN | 0.00 to 0.22 |
| Restricted outcome | Chance | Lands at | Net there |
|---|---|---|---|
 CZ75-Auto | Chalice | 50.00% | FN 0.068181 | €273 |
 Desert Eagle | Hand Cannon | 50.00% | BS 0.480451 | €347 |
Restricted to Classified
Ten Restricted skins from The Cobblestone Collection return one of 1 Classified skin, each at 100.00%, when all ten come from here.
Cheapest ticket: ten Desert Eagle | Hand Cannon in Field-Tested, €2,510. Inputs run from Desert Eagle | Hand Cannon at €251 to CZ75-Auto | Chalice at €267. No StatTrak contract on this step: the versions aren't there on both sides.
| Restricted input | Cheapest ask | Wear | Float range |
|---|---|---|---|
| Desert Eagle | Hand Cannon | €251 | FT | 0.01 to 0.70 |
| CZ75-Auto | Chalice | €267 | FN | 0.00 to 0.10 |
| Classified outcome | Chance | Lands at | Net there |
|---|---|---|---|
 M4A1-S | Knight | 100.00% | FN 0.053623 | €2,162 |
Classified to Covert
Ten Classified skins from The Cobblestone Collection return one of 1 Covert skin, each at 100.00%, when all ten come from here.
Cheapest ticket: ten M4A1-S | Knight in Factory New, €20,902. No StatTrak contract on this step: the versions aren't there on both sides.
| Classified input | Cheapest ask | Wear | Float range |
|---|---|---|---|
| M4A1-S | Knight | €2,090 | FN | 0.00 to 0.10 |
| Covert outcome | Chance | Lands at | Net there |
|---|---|---|---|
 AWP | Dragon Lore | 100.00% | BS 0.489993 | €3,962 |
Mixing in other collections
The ten inputs don't have to come from one collection: each input hands its own collection a tenth of the odds. Five Consumer Grade inputs from here and five from The Mirage Collection split the contract 50/50, so each of this collection's 4 outcomes drops to 12.50%, and The Mirage Collection's 5 outcomes share the other half.
The other Consumer Grade contracts nearest this one's €13.30 ticket today:
| Collection | Consumer Grade ticket | Outcomes |
|---|---|---|
| The Mirage Collection | €12.60 | 5 |
| The Inferno Collection | €11.80 | 2 |
| The Canals Collection | €11.30 | 4 |
| The Aztec Collection | €16.70 | 2 |
Every collection's contracts, cheapest ticket first, are on trade-ups by collection.
Where these skins come from
No weapon case drops The Cobblestone Collection; its skins came from operations, drops or souvenir packages. 10 souvenir packages also carry its skins.
Questions about The Cobblestone Collection trade-ups
How many trade-up contracts are there in The Cobblestone Collection?
5: Consumer Grade to Industrial Grade, Industrial Grade to Mil-Spec Grade, Mil-Spec Grade to Restricted, Restricted to Classified, Classified to Covert.
What is the cheapest trade-up in The Cobblestone Collection?
Ten UMP-45 | Indigo in Battle-Scarred at €1.33 each, €13.30 for the Consumer Grade to Industrial Grade contract, asks read 2026-09-26.
What are the odds of a trade-up in The Cobblestone Collection?
With all ten inputs from The Cobblestone Collection: Consumer Grade to Industrial Grade, 1 in 4; Industrial Grade to Mil-Spec Grade, 1 in 2; Mil-Spec Grade to Restricted, 1 in 2; Restricted to Classified, 1 in 1; Classified to Covert, 1 in 1.
Can you do a StatTrak trade-up in The Cobblestone Collection?
No. The Cobblestone Collection has no StatTrak versions on both sides of any step, so every contract here runs in normal copies.
Can you trade up to a knife from The Cobblestone Collection?
No. Its Coverts don't come out of a case with a knife pool, so the ladder here ends at Covert.