Wow, currently the Amazon app store is running a couple of crazy deals that have a unique side effect of giving you
$20+ dollars of free amazon app coins to spend on whatever apps you want.
Amazon put a BUNCH of Android photo apps on sale for FREE. When you buy each app (for $0), Amazon gives you "100 Amazon Coins" worth a total of $1. Buy ALL the listed apps.
You should have over 700-1000 amazon coins at this point. Now go to the Grand Theft Auto: San Andreas app page. The app cost 699 coins BUT there is a promo where Amazon will give you another 2000 coins with the purchase.
The apps are listed in the #1 post of this slickdeals link:
Free apps that offer Amazon Coins
Have fun! LOL BTW, I have no idea how long this deal will last until Amazon fixes it.