Selling in audiogon vs amazon vs ebay?

I have been selling Cds on Amazon for about 8 years and have not tried to sell much vinyl online yet. As of March 1st Amazon has increased their Media Fees, for professional sellers(those who pay 40$ a month) there is a 1.80 charge and a 15%charge on the entire (shipping included which is a default 3.99 for most sellers) transaction. This means if you sold a cd for a penny and the buyer paid the 3.99$ for shipping Amazon would receive 2.40$  of the 4$ the buyer paid. It usually costs about $3 to ship a single Cd if you include buying padded mailers in bulk and if you pay standard postage. That means a net loss of about 1.40 for that cd(assuming you had no cost for the actual disc!!). For a Janos Starker disc on the Sefel label that I had the only copy of last week that a buyer paid about $166 for Amazon took about 25$. Amazon may be better for expensive items. I am trying to sell sealed vinyl on my own web site (trytoneclassical.com) but not a lot of people may want to deal with a relative unknown and the site is still young and only has about a thousand LPs right now. I had always hoped that given the time to carefully clean and audition(as I write this a Lyrita recording of the Bax Symphony #7 is playing) vinyl that Audiogon might be a cost competitive site. I still hope that is the case. LS

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.