Lego harry potter is currently at a pricepoint of 15$ on amazone
plus i belive dokuro is at a priceponit of 20$ on the us psn
and there is sumioni as well i belive though i cant check since the eu doesnt have them yet.
also little deviants is under 20 as well tough i dont know if its any good
There is also quite some games that are at a pricepoint of 25-30$ (almost everything that came out more than four months or so ago)
and quite some games that have lauched with a 30$ price tag
-Smart ass
-Monkey ball banana spliz
and sonic and allstars racing transformed will also launch at 30