The American Philatelic Foundation - APF is the only non-profit organization in the U.S. that performs many appraisals with no charge for serious collections previously appraised to the consignor. APF does not buy stamp collections unless it may want one for its philatelic exhibition. American Philatelic Foundation we never do a "quickie" appraisal, for more info on their services visit http://americanphilatelic.com