Selling a very rare album


Want to get your thoughts. I'm selling my album collection and I have a rare issue from Jethro Tull named "Hand in Glove" that only 500 were pressed according to disclogs and popsike. The album actually has paper glued on the front and back with Ian Andersons face with a slogan on the front and the song names on the back. It is a double album in mint condition. How would you determine or who would you ask how much something like this is worth?
rbstehno
Bootlegs are best sold on fan sites of the actual artist. I would find Jethro Tull fan forums and go from there. Back in the day, Elvis Presley bootlegs were popular. Now that RCA has released everything under the son, including many soundboard recordings with their FTD issues, the values have dropped quite a bit. 
Discogs won't even allow it to be listed, presumably because of the questionable legal status of the bootleg.
Maybe you get more money if you gently erase "Hand in" and replace with "Smell the" instead. That way you would have Spinal Tap classic to sell :)
There is a legit 3 lp release of this that goes for about $100. 
Discogs does list bootlegs but they don't allow them to be offered for sale.
If you do list it for sale, make sure that the potential buyer knows it's of poor quality. A hardcore fan would want it anyway. I had a guy send me Gordon lightfoot cassettes years ago. He rated each tape by the SQ. Tapes that I could barely hear, he rated A minus! I don't think I even tried to listen to a tape he rated a B minus. Most bootleg records are of really crappy quality.