It's collectable...JMHO, but not really a "shoot-able" rifle.

While fully functional, the ammo prices for .375 for what I have seen for sale are regularly over $100 for a 20 round box. I've seen several separate sales where the ammo was above $5 per round and more.

Several of the .375 lever rifles on GB at any time at $600, and up, generally with no bids, some with boxes.

So, while collect-able, probably not fast seller, nor a quick rise in value. JMHO, YMMV.