UK sellers that look like they are selling bulk USB Flash Drives may buy there stock from Hong Kong, which would not work in the UK, then they asks the seller not to leave feedback so people won't know that it's Far East stock?

The best thing to do is buy from a UK seller who sells 'UK Stock' and then test it immediately after receiving it to see if it really holds the storage it claims to. Most people who buy a 2GB, 4GB or 8GB USB Pen Drive don't try to fill it up fully for a long time and so they don't realise until it's too late.

Adding files slowly upto the 'fake' storage size will seem fine as there is some sort of programming, code or application which either compresses or 'fakes' the files you save. For e.g. a 128MB USB Pen Drive re-programmed to 2GB will save 128MB fine, but anything above that is compressed or fake 'hex' data and these files will stop working within days, weeks, or months if you are lucky. Too late to get a refund. Sure the seller will say it was a one-off problem if you have a problem with yours within days, and send you another fake 128MB posing as 2GB and you'll happily delude yourself for a short while until you realise that you ignored your instincts, the alarm bells, and me telling you that you should ask for a refund - yes, some have ignored my advice when I have shown them proof, they don't want to face the fact that they've been scammed. It's a natural human instinct... but ignoring the proof is just plain stupidity my friends.

One last note, all of the above can also apply to Memory Cards. A lot of Sony PSP compatible Memory Sticks are on eBay, naturally as the PSP is quite popular so I'm told. I don't know as much about these Memory Cards but I have heard or people (and read on forums) of people's woes with fakes so be careful!

Take care, and enjoy eBaying, because I do...