Across 28 markets the WW floor moved -10% in 53 days: $0.010 → $0.0090.
Cheapest venue vs Steam right now: $1.06 apart (99%).
Sources: Valve item data · our 28-market price snapshot.
How much does UMP-45 (Mudder) cost?
The current floor for UMP-45 (Mudder) is $0.0090, compared across 28 marketplaces with fees included. By wear: FN $0.510 · MW $0.022 · FT $0.0070 · WW $0.0090 · BS $0.0090. Steam asks $1.07 for the same listing.
Where can I sell or cash out UMP-45 (Mudder)?
The best net payout right now is $0.020 on DMarket after its seller fee — the Sell tab ranks every venue. Steam pays $1.01 into your wallet, but Steam funds cannot be withdrawn as real money.
Does UMP-45 (Mudder) come in StatTrak or Souvenir?
Yes — this skin also trades as Souvenir (from $0.060). Use the Quality pills above to switch; every number on the page recalculates for the selected variant.
How do I get UMP-45 (Mudder)?
It drops from London 2018 Inferno Souvenir Package (the container itself trades from $11.59), or you can buy it directly from $0.0090 on the marketplaces above — buying a specific skin is almost always cheaper than opening containers for it.
London 2018 Inferno Souvenir Package
Inspect a WW copy in game 
