Is this Supra a good buy??
 

First off, I'm brand new to the car world, I was strictly into diesel trucks but now I'm wanting t add a car to my collection. Not knowing anything about supras, would this be a good buy:

1993 Toyota Supra
White, 5 Speed, 205,000 miles
$$$ 14,200

Cars For Sale: Car Details - AutoTrader.com

No. Although it's well-kept, for the $$$ the mileage is too high and it's a '93, and an n/a (non-turbo). It'd only be a good deal if it had half the miles and it was a TT.

I was looking at one myself that had 130k miles, was also an N/A. same price.

Also, does the value go up at all if I swap it for the TT 2JZ-GTE Motor and Trans? I know I can get one for about $2k so was wondering if it would be worth it.

You'd need to swap several other items, including the ecu, ignitor, resistor pack, fuel pump ecu, driveshaft, and the primary wiring harness, just for it all to become functional. After all of that, the value would go up some, but it wouldn't be even halfway to TT's value, because the braking system (calipers, rotors, abs valving, abs ecu), suspension, rims, stereo, diff, etc. (and of course, the VIN) all still wouldn't be tt spec.