ORIGINAL: nitrosportsandrunner
i agree with the above^^
just as long as he is willing to run the nitro for you 1st. you need to make sure that it starts easy and runs good. as long as thats the case, its a good deal.
To add to that try then out for a full tank(or 5-10 mins would suffice) to make sure they don't shut down once they hit around 220F if they do chances are the pinch would be shot and they would require a rebuild. 1st used nitro I got that was the issue and I was wracking my brains trying to figure out what I was doing wrong.
If they run that long they are worth it.