I just picked up a box of Winchester PDX1 .38SPL+P for my RG40. The stuff is expensive so I've only put 4 rounds down the pipe so far to confirm acceptable accuracy, but its already eaten ~50 rounds of speer +P without excess wear (that includes any form of explosion, cracking, barrel flying off, etc). Gelatin tests soon to come on those!
As long as it is in time and locks up solidly when cocked and goes bang when you pull the trigger, it will do what it is designed to do safely. As to value-acceptable practical value-little resale value.
Couldn't have said it better myself.
RG's excell as "Carry a lot, shoot a little" firearms, especially when you can get a hold of one for around $50. Make sure the gun functions, fire a box of rounds to test accuracy, and a box every few months to maintain proficiency and familiarity, and it will be there for you should you ever need it.
As to the OP's question, I would NOT bring it to a gunsmithing school as a tool to learn on.
1.They are harder to work on because they really aren't meant to be taken apart much.
2. Parts are hard to find. Numrich has them but who knows when that supply will dry up. I.E., don't buy up those parts, I'll need them later for my gun!
3. RG's tend to garner sneers and disapproving head-shakes from gun snubs and those who just don't know any better. If you want mad street cred, leave the RG at home.
Heres the gunpartscorp page on the RG31, schematic and parts list.
http://www.gunpartscorp.com/catalog/Products.aspx?catid=8739