hi all - i am looking to build a charm bracelet with about 4 to 5 tiffany charms. question is i see there quite a few up for sale on ebay; so does it make sense to build preloved versus new? the charms seem to be going for about 60-70% of retail; any pros/cons in going preloved? are counterfeit charms a thing aka could i get cheated? thanks in advance for your candid thoughts!