[5th_bike]

1800 is too much, I'd start offering them 1100 and then maybe pay 14-1500 at the most. You will need several hundred to get it ready for the road, as geezer said.

Try and see if the current owner is willing to jump start it from a (non-running) car battery. It may not run when the carburetor is clogged, though.

You could also try and have them get the bike running, and you take care of the tires. "I'll give you 1500 if you get it running".
Then, they would have to take it to the shop and have a mechanic clean the carb and install a new battery.

I'd only pay 1800 for it if it were in tiptop condition, ready to roll.

I see why you fell the urge to run away though, bikes with a title change history, that sounds a little fishy. You may want to inquire about the story with the bike's title.

Lastly, the blue on the exhaust pipes looks like it's a low mileage bike indeed.