The only way to truly determine it's value is to list it auction style. Top dollar gets it. Pay no attention to what others are asking, many are very proud of their guitars and the asking price reflects this. I do believe some of them want desperately to keep the guitars.
I've seen overpriced guitars listed for literally years with no buyers or lots of rejected offers. Recently I negotiated with a fellow on Reverb who had a PE Anniversary model that was listed for 6 years for $750. He would only come down $30 and that's if I took the case out of the equation so I passed. It's still there after 7 years. Another guy was more than willing to come down and it is now part of my arsenal.
https://reverb.com/item/5762524-aria-an ... e-in-koreaHere's a perfect example. After 7 years you'd think he would get the "too high" message.
https://reverb.com/item/2300726-aria-pr ... ric-guitarAnd another 5 years old:
https://reverb.com/item/17223877-aria-p ... nniversaryIf you're wanting to squeeze every penny you can out of it list it high but list it "Or best offer." Within reason of course. It is after all a bolt neck LP. Either that or list it somewhat high but periodically drop the price by 10% or 15% until it sells.