The PlayStation Store was just updated in Japan with more PS2 Classics. You can get Sengoku Basara 2 for 1,200 yen ($12) and Sengoku Basara 2 Heroes for 1,200 yen ($12) as well. Heavenly Guardian, a spiritual successor to Pocky & Rocky, is 900 yen ($9) and the Sega Ages 2500 title Puzzle & Action: Ichidant-R & Bonanza Bros. is 800 yen ($8).
Puzzle & Action: Ichidant-R & Bonanza Bros. is the cheapest and probably the rarest game on the list. Sega Ages titles are hard to come by and this collection includes the shooter/platformer Bonanza Bros. plus spinoff games.