As a BBB owner, I was watching this one intently. The reason that BBB's command such high prices is that the Capcom "remakes" only totalled about 130-something machines. The project took over 4 years and investors were out the entire $4500 price for most of that time. For such a low-numbered game, virtually every individual is mint and has never been a public game. Prototypes, which are extremely rare run from about $18,000 to $28,000, when they come up for sale.
The game is slightly above average in terms of playability, has some of the greatest original artwork ever seen on a pinball, a ton of (sometimes annoying) sound effects and is only a so-so theme, I agree. If you want to compare it to another machine, I'd suggest Circus Voltaire. Flashy, somewhat fun, but not too deep or a high replay value. Cactus Canyon may have about as many gadgets, but is a much lesser machine that only became collectible because it was viewed at one time as the last standard pinball that Bally/WMS produced before experimenting with P2000 and then bankruptcy.