Who's good at appraising stereo equipment?

The most accurate appraisal service is a decentralized network of interested informed specialists who will in their collective wisdom not only tell you but demonstrate to the penny what each component is worth in the marketplace. Its called eBay.

eBay, Hi-Fi shark, Reverb, Worthpoint, Orion Audio Blue Book, AudiogoN Blue Book.

Audiogon Insider membership $10 per month or $100 annual give's full access to Blue Book information which is more than just a price guide, plus exclusive members only forum. Worth checking out for only $10.

Valuing used products is tough.  I accept trades for used gear and their is a trick to it.  The Agon bluebook is a good place to start but it uses a simple algorithm to determine value.  Looking at prior sales in Bluebook is helpful but they average full history.  Recent sales are most relevant.  You need to audit a variety of sites to see what things are listed for and assume it is worth about 10% less than list price.  

Sales from bluebook combined with current list price on hifishark, eBay, Agon, etc... is the best way to value things.  

Ebay's prices have been up and down ....all over the board...they  guys selling  sSanyo equipment for Hundreds....Really give me a brake.

Try try Dave Wasserman at Stereo Exchange in NYC. He’s knowledgeable, professional,and most of all honest. 

After searching:
eBay "Completed Items" checkbox
hifishark "Sold/Expired" tab

Some insurance companies have "loss experts" in specific areas. One of my former partners in our stereo shops became one of these specifically for stereo equipment for Metropolitan ins. company.

Is this a reliable source?
http://kruipen.com

Perotta Consulting