Defective, counterfit Sony Memory Stick PRO Duo cards on ebay?

I have recently purchased a few MS PRO Duo cards from different sellers on ebay and it seems that they are all bad. 2 have broken and 1 wont let me insert it into the PSP any more. The defective part comes down to the same thing on all of them, the little part that covers the front of the card breaks off or is not aligned properly. I have a store bought Sony 2GB card and it works fine and the craftsmanship seems better than the others. I also have 2 SanDisk cards and they are built even better than the Sony cards, in fact I think I will only buy SanDisk cards from here on out. I just purchased an 8GB Sony card off ebay and it has not arrived yet and I am getting the feeling that it will be defective also. I have a 4GB SanDisk card coming from Amazon.com, and I hope this will be a good one. I am wondering if anyone else has found this to be a problem with MS PRO Duo cards purchased off ebay or other discount suppliers? I have had SD cards for years with no problems and not all are name brand, is it just the MS PRO Duo cards that are built cheaply? And they are also the most expensive of the different media cards. I was thinking about buying an adapter for Micro SD cards that will fit into the PSP, has anyone done this? I think that as of this blog I will only buy my MS PRO Duo cards from a brick and mortar store or just stick with SanDisk. I have inserted the broken cards into the adapters that come with the cards and can use them with my computer for file storage kind of like a flash drive, but I cant use them with the PSP and this is why I bought them. Anyway check out the image and if you have had the same problem let me know, I don’t think I am the only one that is getting bad media like this.

Top view of defective cards.

Bottom view of defective cards

Broken card with piece that broke off.