If you are looking for a nice, easy to deploy folder, go to either Woodcraft or Rockler and look for what they call the large folding knife. It is a Sarge brand liner lock with thumb stud for opening. Not on sale they go for about $20.00 each. If you so desire, they are very simple to dis-assemble, and are easy to sharpen - which I suggest, as they usually won't shave or cut phonebook paper as they come.
Before offing mine for sale, I sharpen to a razor edge, mirror polish the secondary bevel, and tune the blade deployment. Result is a nice, easily deployed, VERY sharp knife - which has really good edge retention.. In some previous posts I've shown photos of some of these before sharpening and polishing.
I have found these to be the best value available in folding knife kits, and are easy yo build into a knife that , around here in NE Mississippi, can easily sell for $150.00.
DrD