@Dick Barton and you then sell them on eBay? Do you have any particular marketing strategy or is your eBay sales pitch just a standard description with a low starting price?You could do well with frames. I (usually) only pay 50p each and look for metal ones or ones with a bit of ornamentation. I find them in charity shops and car boots.
I sell them on ebay as buy it now at the price I hope to get. I usually sell them as a group.