Should I buy this car advise

[1933beer]

Hi I am new to this forum but not new to Toyotas. I have an opportunity to buy a 1987 supra base model. Has 157k miles no rust great interior. Some of the car has been sanded is the hood and fender part of rear bumper. The owner removed the engine about 8 years ago because it had seals leaking. He replaced seals bearings rings and wp. Put it back together. Put it in the car and stopped work.
He has agreed to $650
He has owned the car to 17 years it is in a storage garge . it is rust free.

I am not worried about paint but I am concerned about the enigine. He never got the accessories back on so he never started it. Also worries me about the fuel.

What do you guys think?

I own a 1985 gts Celica cab
1990 Porsche 944s 2 cab
1997 bmw z3
2002 Toyota 4 runner
Owned a 1980 supra back in the day I

I do all my own work so many with a wrench.