I have inherited a model 23, like the one in the picture but gave it a oil finish, which improved the stock a lot.
I have no use for it, and tried to sell it, but only had a ridiculous low offer from a buyer in the UK.
I though about sending it to the US, but I'm not sure if it's worth the trouble I'll have with paperwork.
If you think they are hard to sell in the US, you should see here... no one shows even a remote interest on such a heavy and short barreled gun.

HM