Scott makes a good point about notifying the seller. I was looking at a pair of speakers here that were demos listed by a dealer. The stated retail price was $200 more than even the MSRP as listed on the manufacturer's website. I called and the dealer seemed genuinely embarrased and apologized by saying that it had been a typo. The dealer did have a decent rating, though I still had a nagging doubt. I know some do this intentionally, though I think in this case it was an honest mistake. On the other hand, my lingering uneasiness points to the need to be careful when listing. Might cost you a sale.