It looks like it's available from 3rd parties on Amazon for about $13 shipped. I'm not trying to knock the deal; obviously $5 is a great price. I just noticed that a lot of people were asking to get an extra shipped, and wanted to mention it to them, in case other CAG's can't help out. After you paid maybe $6-8 to another CAG for the game (hey, tax, time and gas ain't free), as well as $2-3 for shipping, you'd only have to shell out another couple bucks to get it online.
Yep. $5 for the game. Up to $0.50 for tax. $2 to ship it USPS First Class Mail through PayPal (the cheapest). At least $1 for that CAG's shipping material. At least another $1 for the CAG's transportation and time to acquire the game for you. You're looking at $9.50 to $10 to another CAG.
Amazon just had it for $10-11 shipped not too long ago... Apparently its back for around $13 now. It'll be lower soon enough, I'd guess.