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<p>[QUOTE=&quot;davidh, post: 415055, member: 15062&quot;]My thought exactly.&nbsp; I&#039;m no giant fan of ebay (although I do use them from time to time - I prefer Craig&#039;s list for most stuff) but there&#039;s simply no possible way for them to police their vast number of yearly listings.</p><p><br /></p><p><br /></p><p><br /></p><p>You apparently overestimate the abilities of the computer.&nbsp; While what you suggest is technically possible, it would require hundreds or thousands of additional full time employees and several petabytes of data storage to manage the project. Remember, coins aren&#039;t the only things being offered on ebay.</p><p><br /></p><p>In 2005, there were 10.3 million cases of property crimes ( <a href="http://www.fbi.gov/ucr/05cius/data/table_01.html" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.fbi.gov/ucr/05cius/data/table_01.html" rel="nofollow">http://www.fbi.gov/ucr/05cius/data/table_01.html</a> ).&nbsp; In the same year, ebay had 1.4 billion listings ( <a href="http://findarticles.com/p/articles/mi_m0EIN/is_2005_Jan_19/ai_n8701302" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://findarticles.com/p/articles/mi_m0EIN/is_2005_Jan_19/ai_n8701302" rel="nofollow">http://findarticles.com/p/articles/mi_m0EIN/is_2005_Jan_19/ai_n8701302</a> ).&nbsp; This would have required up to 14,400,000,000,000,000 one-to-one comparisons to find a single match.&nbsp; Add to this, pictures simply can&#039;t be compared by a computer unless they are in the same scale, with equal lighting and perspective.&nbsp; In practice, photos would have to be compared by humans.</p><p><br /></p><p>There are 31,536,000 seconds in a year.&nbsp; Making 100 comparisons per second (24/7) would produce only 3,153,600,000 comparisons.&nbsp; To fully compare the 14,400,000,000,000,000 needed matches would take one computer 4,566,210 years.&nbsp; Or 1,000,000 computers 4 years, 206 days and 19 hours.</p><p><br /></p><p>&nbsp;&nbsp; The instant access and matching of data as shown on CSI simply doesn&#039;t exist.[/QUOTE]</p><p><br /></p>

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