Honda Odyssey and Pilot Forum

Hi Guys, Mark here,  I finally got around to gettting my fl350 up and running. It hasn't been running in at least 10 years. The motor turns over but won't start. The compression is low, 40psi, but will hold at 120 for a bit with a few drop of oil in the cyl making me think it's the rings. (actually a mechanic buddy has been messing with it and that's the info). The big question is how big and expensive of a project is a rebuild, and is it worth it for me to do? I'm really not sure what I want to do with the machine and have way to many projects as it is. Should I consider Ebaying it as is??
Or, could someone connect me to a decent rebuild article?