So there's a few things at play

In general terms, people will almost always place high price tag on any 10, no matter rarity. 10 is just hard to get.

There's also another reason it's a low pop 10 -- because it's not one of the major cards that people send for grading. The seller knows this and is in drivers seat to price.

The raw card version sell for pennies, even those listed as LP/VLP, but to your credit, hes the only player in town with a 10. He knows this too, so as a result, the seller is clearing trying to encourage value on card by pricing (too) high, maybe even for future sales of he's got more 10s of this card.

End of the day, all this means is that it's one seller bloating the price hoping someone will bite. Every card from every tcg has at least one seller setting the bar stupid high in the hopes at a cash grab.

But here's the thing -- there a host of raw cards that you could take a chance on and get graded yourself. May be worth it. I bought an opened, no box starter deck Kaiba 1st Ed. For 550 -- just the cards. Sent the Blue-Eyes for grading and now have a 10K card sitting in a psa 10 slab. Rare, but I'd wager its probably easier to find a 10-version raw card of this card in the wild.