Thanks Page. I can understand why Amazon would want barcodes, just not something I've thought about before! The site is gs1uk dot org (not gsm).
You're right - it may not be worth my while spending £200 up front - a shame as it would have probably been worth trialling Amazon as a marketplace, but I'd have to sell a lot of cards before I recouped that £200, so may not be a risk I'll take at this stage.
It does, however, beg the question as to whether one can buy a few barcodes, albeit at a higher price for each individual code. Perhaps this is a business opportunity out there for anyone who wants to take it - buy 1000 barcodes for £100 + £100 joining fee: cost 20 p per bar code ( a cost that would go down in the future as wont have to pay the joing fee again) and sell them on individualy to people like me who only need a few for, say £1, a barcode = £800 profit on £200 investment.
Interesting figures, now where's the flaw ...?
Thanks again for your help
Jeff