I would never buy from that guy (the one selling the polarizers on ebay). I should create a thread but a friend of mine had a very negative experience with the seller, where he seemed mentally ill or just plain vicious (he insulted my colleague, creeped into his eBay history, left misleading/false feedback -my friend asked for a cancellation early on, the seller essentially marked the items as shipped right after and sent a message that read like this : "too bad you couldn't get the address right, no returns and shipped!", he opened a case and he backed off... after a long list of insults and the aforementioned creep act altogether). The detonator was just my colleague asking for a cancellation BEFORE anything was marked as shipped, and eventually it became evident the seller had not shipped anything yet (he was on vacation so he ignored the request, marked as shipped, never provided a tracking number, then backed off and said he actually had not shipped it, and said my colleague was a 'scammer').
I have screenshots of everything, but like I said, it deserves to go into its own thread. Based on this and the fact that my colleague has an excellent track record of never having trouble with eBay sellers until this loon, I would strongly not suggest putting your money into the pockets of someone of this low caliber. You can also make your own polarizers like another poster mentioned.