Or somehow manage to buy a Smash 3DS Club Nintendo card unused from eBay for $5/$10 if you want it that much.
The primary reason I bought Smash 3DS was to obtain the Club Nintendo card so I'd get the Smash 2CD Soundtrack besides playing the full game for a while.
All dat music... Especially after everything they showed off on the announcement, im really glad to be getting the CD, because there is NO WAY i'd download that much music to my tablet/phone.