Konami is having a massive sale discounting every single one of their games to $0.99. No matter what your take on the games, there's definitely deals to be had here.
Power Pros Touch ($3.99 -> $0.99)
Krazy Kart Racing ($2.99 -> $0.99)
Silent Scope ($2.99 -> $0.99)
Metal Gear Solid Touch ($5.99 -> $0.99)
Dance Dance Revolution S ($4.99 -> $0.99)
Silent Hill ($4.99 -> $0.99)
There's no indication how long the sales will last, but it's safe to say that despite any shortcomings every game listed above is worth at least $0.99.