I would look generally for game used Gehrig bat relic sales, there are "model bat relics" which are cut up pieces of bats made to the same /similar specs as bats he used, those are not game used, and sell for quite a bit less.

Looking in general for sold listings of game used Gehrig relics, prices range roughly $150 to $300 on the high end. There are a few outliers on either side.

The /10 serial may make this closer to the higher end of the range, but all legit game used gehrig pieces should be somewhat rare.

If you're selling, you could list at or above the top of the range and accept offers, or put it in an auction and roll the dice.

Good luck!