I picked up this cassette game this weekend. It is complete in the box with manual, cassette, and plastic tray. It's in great condition. I couldn't find it on the DP Online Rarity Guide but it is listed on AtariMania as a rarity 8. It is marketed as "tri-compatible" and has a version of the program for the VIC-20, TI99 4/A and the Atari 8bit line. I borrowed the pic from The Personal Computer Museum since my camera is dead.

Anyone have any idea on the value?