A quick search of eBay would correct your
'understanding'. There are
dozens of copies for sale, many with boxes and manuals. They start at
about $5.00.
I stand corrected.
The game is very common, and generally considered worthless. It's a
joke, possibly the "worst video game ever made" - up there with
Superman 64 for N64.
I could have sworn that prior to the "dig" I read a number of articles
indicating that this was one of the reasons for the dig i.e. The game was so horrible
Atari tried to destroy any and all evidence of it by burying it so only a few copies
remained.
However, as the game is apparently readily available I would say both editions are
worthless or to be more precise of low monetary value. But as the old saying goes
"one man's junk..." :)
-Ali