I see nothing wrong with this price (or any for that matter).
If someone wants Apu's autograph (come again included nonetheless) it is tough to put a price on that. eBay shows $100 to $120 for Hank's signature, the come again has to be worth at least another $100. Each of the other signatures are "worth" the same ballpark. So value added to the right buyer.
It would be a big stretch for me to justify the price. It appears to be a nice machine... I miss when this was reviled and I turned down the chance to buy in for $3000.
I can easily see an impulse FU money Simpsons fan buy this.