Here at EBTH we offer a free tool for prospective sellers to receive an expert opinion on what their treasures may be worth. The EBTH Value Estimator Tool uses the model of auction estimates to provide an opinion of value. An auction estimate is an opinion of value of one or several category experts at an auction house which informs both buyer and seller of the probable range an item will sell for at auction. Auction Estimates are determined using historical sold prices for similar items presented at auction within a two year timespan. Please note an EBTH Value Estimate is not a guarantee of projected sale price.