So for example, you list an item for sale, but during the listing process the website will show different prices from several online retailers. This allows the user to make a better judgement when determining the right price. Is there any script or web app that does this?
closed as not constructive by Barry♦ Nov 18 '11 at 22:37
As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or specific expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, see the FAQ for guidance.
Searching for the item using Google Product Search will show the prices in bold, although it takes some fine-tuning to find the most appropriate results.
There is http://researchit.get4it.com/ which focuses on what items have sold for on eBay as an indicator of general market price. It will also list what an item sells for on a variety of other sites as well.
It is geared toward sellers, and includes charts and statistical data on selling prices.