Don't talk yourself into it because it's cheap (Suzuki), you'll regret it and built from two bikes? Might have been crashed and parts from that used on another possibly crashed vehicle... not worth your life should anything go wrong!
Buy what you can afford, the Kawasaki is obviously in your price range as you are looking at it and it sounds like a well looked after bike from what you have described and had some good modifications and sounds like you could ride it away, just barter the price! You can gauge a lot about a product just buy speaking to the owner so make sure you have a phone call with them!!
Summer is on it's way! (Touch wood)
