Looking into a used KX65

[Super Dude]

My daughter is stepping up from a 04 KTM pro senior. I'm looking into a used (green sticker) KX65. I have a few questions on what to look for on these bikes. 1st I'm looking into an 02-03 bike. What should the compression #'s be for a good motor? What is boarder line #'s that it is time for a new top end? what else should i look for? Any know problems on the years im looking at?
Thanks
SD

[FPMXer]

Good compression should be above 100psi. If you live in So-Cal I'm selling my sons KX60 granted it's a 97 but for $700 the price is right. It's not a show bike but it runs like a raped ape. My son is bumping his knees on the bars when he turns and just doesn't have as much fun on it anymore.