Audio valuations


Is anyone else interested in determining a fair value for used high end equipment? I understand we all try to sell and buy our equipment at the best price, but where to start? I recently listed
a item for sale and set a price that I thought was competitive based on very limited past sale information. I did receive an offer that was $500 less than asking price. Was I too high or was the offer too low. It would be helpful if we could see what others sold their equipment for and the condition of the equipment. I want to sell my equipment, but I don't want to give it away.
Any thoughts on this matter?
elf1
There are not many sales but I would guess that should sell for 1200 - 1500

Audiogon has much more traffic and items sell faster than other sites IME
It seems to have been a buyers market here for some time now. I’ve sold a number of things in past year or so and received a reality check. As with all commerce, something being sold is worth only what another will pay.
I listed preamp for $1300 as it is a B  model. The offer was $500 less than asking price. I am willing to reduce the price if it is a reasonable offer.
 Thanks for all the advice.
People just aren't spending on audio in general.  I just sold a pair of Revel bookshelves...  I got about $100 less than they were selling on eBay and other sites.  Given that it was a local, cash sale with no shipping involved , I'd say we were both happy.