Got this random Sportsmatic

I recently bought a few Seiko non-working watches for parts and got this one as a bonus:
When I move it, it starts working.
However there's a strong vibration inside too. Perhaps the rotor is damaged.

It's a snapback so I can't open it.

What do you reckon I should do? I don't have others like this and I am not much into gold filled watches. Honestly I didn't expect it to look so nice. The case is worn out, but the dial is pristine. The crown is unsigned and I am not too fond of the movement.
There doesn't seem to be a quickset.
The crown is very hard to operate due to its small size and position.

Considering shipping isn't cheap, should I even bother selling? I mean, people always ask for a lower price even when I am trying to sell stuff for the priceI bought it for.😀 At this point I am expecting people to try ask for a price lower than the shipping cost itself.

The movement is not in good condition(based on the weird vibration) so any potential buyer would be buying it just for the dial or caseback. Crown operation is annoying too. And the case plating being worn out too.

I think maybe I will just use it to practice opening a caseback after I get the tools.

As for giving it away to a friend, I don't have any Seiko collector friends. Otherwise I would have probably done it.

The crystal is shit. And so are my photo skills.

There is no damage to the dial. But the watch itself is junk due to the other factors I mentioned.

Possibly. When shaken it starts working, so the movement is not dead. It's interesting what's making it vibrate so strongly. Like literally a phone. I haven't had another Seiko do that. But then again, I don't have a lot of autos.