I know this thread is almost a month old but I just wanted to add a little to what spillage has said.
I too recently bought a PSP and decided I needed a larger memory card for it. Not knowing of the massive amount of fake Sony Pro Duo cards on eBay I thought I'd found a really good deal on a 4Gb stick for £25 with 24hr shipping. Anyway, after bidding I was looking around the net for info on PSP homebrew and stumbled across a thread about fake Sony memory cards and info telling you how to spot them. Here's a really useful link detailing all the differences between a genuine card and a fake
CLICKY.
Eventually (after 6 days! not 24hrs like I paid for) my new memory card showed up and sure enough I'd been sold a fake

. It came in the full Sony packaging with the adapter and even had the gold hologram etc. Seems to work fine and has the full capacity you would expect from a 4Gb card (I packed it full to test for data coruption). All the homebrew and games I have backed up seem to run flawlessly and full movies/music I encoded to the highest quality play fine with no lockups or stuttering. I actually can't really fault it although I do know that data transfer speeds are slower than an original.
I'm a bit pissed at being sold a fake but at the same time I did get myself a fully working and very cheap 4Gb memory card. I emailed the seller about him selling me a fake to which he responded with an apology + offered a full refund. I've still to decide where to take it from here. Selling fake goods on eBay is fraud and the buyer is entitled to a FULL refund including all return postage costs.
So there you have it. Think twice about buying cheap memory from eBay!. Read the info in the link above before you buy (I wish I'd seen it before I did!).
QUOTE(spillage @ Jul 31 2007, 10:40 PM)

Anyway that old saying " you get what you pay for" was driven home to me today with a large mallet. Pay attention to what you're buying and don't end up feeling a bitter plonker like me.
Very true!

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