Bad is down near 100. Sometimes they won't barely run with it that low. Normal for a healthy engine is about 150. I believe in replacing the cam chain if it's original along with all the other stuff mentioned. You can get by for about $200 if you do the work yourself. Here's a little price breakdown .....
Rings - about $60
Engine Gasket Kit - about $50 (this will include all needed o-rings and valve guide seals)
Cam Chain - about $50
Front Cam Chain Guide - about $30 to $50 (depending where you get it)
You can lap the valves in yourself for about $10 (grinding paste and lap stick)
If you plan on doing this several months from now, start watching eBay for some of the stuff. I got my rings for about half of the normal price. I've seen gasket sets go cheap too. I just scored 2 cam chains for $20 each.
Rings - about $60
Engine Gasket Kit - about $50 (this will include all needed o-rings and valve guide seals)
Cam Chain - about $50
Front Cam Chain Guide - about $30 to $50 (depending where you get it)
You can lap the valves in yourself for about $10 (grinding paste and lap stick)
If you plan on doing this several months from now, start watching eBay for some of the stuff. I got my rings for about half of the normal price. I've seen gasket sets go cheap too. I just scored 2 cam chains for $20 each.