Why Doesn't Warners Archive want my money?

I earned some extra money at the BangPop show last weekend selling some of my books, so I decided to finally order the Genesis II, Planet Earth, Strange New World and Captain Sindbad MOD (Manufactured On Demand) discs from Warners Archive. Unfortunately, I discovered that the WB online store won't accept debit cards or Paypal, and since I won't use a credit card anymore in protest of the banks' extortionate practices (and don't even have one at the moment), it appears that I won't be getting any of the Warner Archives stuff for the foreseeable future.

Which really fuckin' sucks, because they're about to release the complete Thundarr The Barbarian series through the Archive, as well as some 60's sci-fi flicks that I've been wanting to get my hands on for some time, including The Green Slime, Wild, Wild Planet and War of the Planets.

Considering all the other stuff they have that I want - like the Tarzan films, The Bermuda Depths, the Man From Atlantis pilot film, etc. - I'm really pissed that they won't accept my debit card. I looked up some of those WB Archive discs on Amazon, but they were way more expensive.