Hello, are you interested in this bike?
Hello, I am interested in the bike.
Do you have any questions about it?
It seems like it's in great shape, but are there any issues with it that aren't listed? I am on a budget on what I can spend so I need a good deal please :)
None, at all. Like I posted it's all custom built and if you have issues you can bring it in and we'll fix it for you. 
Okay, sounds good. I would like to offer 485 for the bike. I know it may sell new higher, but even though it's a great bike, it's still used so more likely to have some issues pop up sooner.
Yes, not going to be able to do it at that price. The parts cost more than that. 
Well, as I really am on a budget, I can go up to 532, but that is really the most I can pay for the bike. I just can't afford a higher price.
The lowest I can go is 600.
Let's meet in the middle at 550 and that would work out well for both of us.