Just thought I'd throw this out there for those wanting a BYO sub. A person on eBay, with a really good rep, is selling subs for $17.10 (as of today, normal price is $18). He/she has 5 subs left as of the time of this message.
I'm not the person on eBay, BTW. After looking at the seller reviews, I decided to pull the trigger and purchase a years subscription.