A sale of select SEGA 3D Classics titles has begun in the Nintendo 3DS eShop. Normally, the titles are $5.99 each, but right now you can get them for $3.99 each. Here's the the titles included in the sale:
3D Super Hang-On
3D Space Harrier
3D Ecco the Dolphin
3D Streets of Rage
3D Streets of Rage 2
3D Shinobi III: Return of the Ninja Master
3D After Burner II
3D Out Run
3D Gunstar Heroes
This sale will last until June 20th. Source: eShop