If they're going to sell it for that much, the least they could do is 1. describe in detail the condition of that particular specific item (instead of just a general A, B, C grading) and more importantly, 2. list the fact that the all-important disc is not included on the auction title itself.
If you browse the seller's store and sort by price, you will find the album in a sea of similarly priced brand name bags, watches, jewelery. Remember, this is the album WITHOUT the disc. To be fair though, the SDK2 OSV is legitimately rare unlike the aforementioned items, and the music will never go out of fashion.
Maybe the auction lister fat-fingered the price field and intended a 5 figure digit, not 6?