An auction doesn't neccesarily reflect what something is worth, just what it is worth to the buyers who wanted in that 1 week the item was listed.
I remember seeing a Retro gamer magazine with a copy of Amiga Forever Cover CD with ROMS and games that went for $80 Aus with 20 unique bidders. I had one of these in mint condition, so i waited till that auction was over and listed mine straight after for a 3 day auction thinking the ones that missed out would jump on it. Nope-I got $10.
So what its worth will depend on luck to a large degree.
The auction probably had a shill bidder.