Just for reference, for anyone thinking about selling cars, here is an example of what can happen to your income at any time (my night tonight):
2007 Ford F-150 - Didn't get approved, co-signed failed. ($1,200.00)
2011 Lincoln MKX - Customers Backed out. ($500.00)
2010 Ford F-150 (Mentioned in earlier post) Cancelled ($400.00)
= $2,100.00 lost in one evening.
Feels bad man.