All depends on your wrenching skills. Not going to be 10000 write-ups on g20 sr20 problems. 6g is steep without knowledge on setups. He could be runing a t25 vs a gt30 and the supporting mods might add up. More info. Personally, i wouldnt own any older Nissan unless it's a 240,r32-4 or in the z family. Everyone is different. Goodluck, I hope more chime in when you add more info. Look at what you like about the car itself, then consider if you like the setup (motor turbo suspension blah) You might just like the idea of an sr20, and you could cop an s13 same setup for half the price.