If you didn't offer the current potential market value of the Green one then I would say that's a no go. The gold one looks to be something worthy also..... It all comes down to your numbers. Who knows, you may just get lucky.....
I made very fair offers. I also offered to put some of my own money into the green car to get it running, stopping and cleaned up to help them get the most out of the green one as long as we could come to terms on the gold one.