Hello!  Looks like you're looking for a fantastic bike!  I've got one at a fantastic price!
I'll give you 50 bucks for it.
No.  I can't go that low.  I'll do $175 and through in an extra tire.
It already has two tyres. That's a used bike of a very unremarkable design. $50 would generous even at a pawnbroker.
No.  I'm asking $200, but would be willing to take $165.  That's the lowest I'll go.  
I'd pay half that for a used 18-speed, not a 7 with a fixed front sprocket.
I think you're looking at the wrong bike then.  This is an upgraded Jamis.  Are you not willing to pay the $165?  I'm not even going to consider $50.
Well that's a shame considering that's about what you're looking at for a used low-end bike, which is effectively worth nothing to you if it's not sold at all. The question here is whether or not $165 is worth waiting forever for, or whether you'll accept 75 and get on with your life.