The current floor for Nova (Sand Dune) is $4.42, compared across 26 marketplaces with fees included. By wear: FN $11.21 · MW $3.06 · FT $3.60 · WW $4.42 · BS $2.70. Steam asks $6.00 for the same listing.
Where can I sell or cash out Nova (Sand Dune)?
The best net payout right now is $1.52 on CSFloat after its seller fee - the Sell tab ranks every venue. Steam pays $0.480 into your wallet, but Steam funds cannot be withdrawn as real money.
Does Nova (Sand Dune) come in StatTrak or Souvenir?
It does - Souvenir (from $4.42) listings exist too. Pick a Quality pill above to see that variant priced across the same markets.
How do I get Nova (Sand Dune)?
The drop source is DreamHack 2013 Souvenir Package, itself listed from $759.44; the direct market price starts at $4.42. Opening containers for one specific skin rarely beats buying it outright.
DreamHack 2013 Souvenir Package
Inspect a WW copy in game 
