Leave this bike and seller alone...
If it has no title, what would you even do with this bike if you get it running?
Can't drive it on the road anyways, can't get plates or insurance either.
You can find a really nice ninja for 1.5K - 2K.
1984 Honda CB650sc - Nighthawk - with 33K miles - Fuelly Log
1982 Honda CM450a - Hondamatic - with 11K miles - Fuelly Log
2007 Kawasaki Ninja ex250 with 29K miles - Fuelly Log