The seller isn't a collector, he's a gentleman that was well-involved in pinball art, development, and programming. I've purchased many pieces of art for many thousands of dollars from the seller, and I can't say enough good things about him. He ships fast, packs well, and maintains fantastic communication throughout the transaction.
If Magic Girl can sell for $16,000+, I see no reason why something like this couldn't reach sell for $8,000.