Selling in audiogon vs amazon vs ebay?

This is just my experience to share.
I almost always have had a better experience in selling or buying audio gears (mid-high end) in Audiogon compared to Amazon or Ebay.
However, selling music had been different. I have quite a collections of LPs and I am thinning them down. Mostly classical LPs. I have sold quite a few of them in Amazon, but very few in Ebay and none in Audiogon. With equal price, do you think selling LPs in Audiogon is tougher than in Amazon or Ebay? Amazon and Ebay have much wider exposure, so it is understandable, but I wonder if it also has to do with kinds of audiences: Audiogon users are generally more for gears than music, and for music, more for audiophile grade recordings or sought after recordings than average recordings. 
Just a thought.
Your opinions are welcome.