I think Wolfgang said recently Ed viewed it as a piece of shit and it was just kept lying about on the floor until it ended up in the museum. I'm sure if you played it then it would be way worse than a $500 EVH guitar but middle aged stockbrokers want to believe that if only they but a replica of it for $25000 they will suddenly get great at guitar. I think part of this is because the tapping bit in Eruption can be done after 6 months of taking up guitar people thought/think that their playing will continue rise at that level and when after 5 or 10 or 20 years they still can't play half of the rest of it they think it's something you can just throw money at.
I've done it myself - I remember buying books of guitar tabs back in the day assuming that I would then be able to play stuff ignoring that
a) If I bought sheet music to a Bach concerto would I expect to suddenly be able to play that on piano?
b) A lot of the tab books weren't accurate at all. Nowadays YouTube is also often wrong but at least it's free, you have video and you can shop around.