if I sold it, it would probably need to be in state because I'm guessing no one would want to pay a transfer fee for just the frame.  Not really interested in building a new gun off of it.  I've been toying with the idea of using it to practice stippling.  I've stippled several magazines and have been very pleased with the results but afraid to attempt stippling any of my pistols.  Even though I don't have a use for it, it's in perfect condition and I don't want to ruin it.  What would you guys do?

I would post it up for sale in the EE.  I sold a Glock frame there.  Some people want to customize them, or build their own.

Keep it as a spare, practice your skills on it, or sell/trade it.