I have a queen-sized mattress from Mancini's that's in really great condition, only 3 yrs old, no stains or rips, that would be perfect for a flatform bed frame. I need to get rid of it ASAP (by this weekend) as I'm moving next week. Bought for $700 but willing to negotiate a price closer to $200-300 range. Sorry, you'll have to pick up the mattress from Redwood City as I don't have transportation available. Picture attached.