That's a great bike you have there. Are you the original owner?
yes. I've had it for 3 decades. This is the real deal. I'm just getting too old for it.it won't last at price just because it's a vintage. make an offer i can't refuse 
Well since it's a collectible, how about $400 for it. It seems to have to wear so I'll have to put some money into it.
man, you have to do better than that. there is no way i can let go of this gem for 400. even at 999 it's a steal. at the lowest i can do 900. 
That's way too much for me. It's not like it's fit for a museum or anything. How about $500?
a 37 year olf BMX bike IS fit for a museum. You're buying a part of history. not some junk bike. This is a schwinn i remind you. I really can't do lower than 900
I really don't have that much money. You have to help me out here. I can scrape together $650 but that's it.
then really, this is NOT the bike for you. You can get a much modern bike for half that price and you will be happier. thi sis a part of BMX history. no deal.