This deal is going on online and in stores. YMMV if you want to price match in store because it has to be available online in stock for them to match the price in store! I was able to snag Sakura Wars yesterday for this promo, but price went up this morning now, price fluctuations will vary!
If anyone wants to make a list of the $19.99 and below games, I can edit main post with eligible titles. I'm too lazy to type up the whole list!