The price a seller sets on a sale is entirely up them. Whether the price is too high or not is determined by the willingness of the buyer to actually buy the product. The most annoying thing to see for any seller is another third party, with no interest in the sale, posting that the widget can be bought cheaper elsewhere. If you have no interest in the sale then please refrain from posting comments on the ad. Those that do, may mistakenly believe they are 'helping' in some way. We will help them correct that mistake by deleting their posts and sending them a warning. If they repeat then we will ban them.
If you are a seller and this happens to your ad then please report it to us in the usual way via the Report This link on the Spoilers post.