I'm not sure what ever happened to this set as it was around for many years. Although I don't recall ever selling it, my guess is that it (much like my Secret Wars Turbo Cycle) hit the eBay market back in college. I do know that a few years ago I came across the bowl and pipe from this set in a box of my old stuff. Having no use for that random piece alone, it definitely hit eBay and probably sold to some Dorito-munching 19-year-old searching for "bowl" and "pipe."
And, for the record, I wasn't the only cousin on that side of the family with a cool E.T. sweatshirt. I was just the only one to throw fashion rules out the window and wear mine two years in a row.