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.
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I am having so much trouble with the selling engine on Audiogon that I had to give up.  I have been able to buy/sell almost a dozen equipment pieces on Audiogon in the past but now there is a disconnect between my registered addresses for my credit card and my main address, and Audiogon customer support is non-existent.  Anyone else having trouble with their Audiogon dashboard?
@cbissell, Please contact Tammy in Support@audiogon.com, and I will be glad to help. 
I never even check with amazon regarding vinyl. I consider them flea market enterprise anyway and buy anything there very rarely. Some people just know nothing but amazon and walmart.
What about Discogs? I keep buying second copies of LPs I already have, just cannot help it no matter how hard I try to check my collection first! Dislexia in action!!!
have to free some shelf space for more goodies, from the responses here I guessed that Amazon is the place to start. Asked about Discogs because I do buy a lot from there