It all depends on what you want. I personally would make the trade but I was/am a mechanice and I do all my own work. Nice thing is, IF it comes down to a motor they are cheap to buy. Depending which transmission it has in it, can be a little more costly to replace.
Just make sure they took care of it, most people just gas and go:mad:
Find a mechanic you TRUST and get them to give it a look over, compression test, cylinder leak down and fuel pressure can give you a good idea of what condition the motor is in. Fuel pressure will let you know if the fuel pump is getting weak.:gj: