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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Here show some sample record sales from Amazon and Ebay:
Price: $25.00
Shipping: $3.99
Amazon fees: -$6.09
Your earnings: $22.90

Price: $35.00
Shipping: $3.99
Amazon fees: -$7.59
Your earnings: $31.40

Price: $89.00
Shipping: $3.99
Amazon fees: -$15.69
Your earnings: $77.30

Some ebay record sales:
Price: $100
Ebay Fees: $14.50

As shown, Amazon charges more than Ebay. But I have more success on selling in Amazon than Ebay for classical LPs in new or mint condition. Amazon buyers seem to be more serious buyers who are willing to pay fair market values. I have a hard time selling on Ebay unless its price is almost half of what I usually sell in Amazon. The $100 one on Ebay was an old Beatles album in mint condition. Those sought after albums are sold quicker in Ebay than in Amazon.
That's my experience.
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.