What Daldaen said. I usually reference auction.goonquest.com for all my price-checking needs. It is a database that parses logs people send in for /auction data, and it is generally close to the typical asking price you find in EC because that is where most of the data comes from.
http://auction.goonquest.com/auctions/search?utf8=%E2%9C%93&search[search]=flayed+skin&commit=Search