Wow, everything posted for sale is ''light use''??

"What are the major considerations in evaluating old equipment and what is considered a good price vs the original MSRP."

The same as any other except issues are more likely with older gear so assume that by default until you are able to disprove. Not a bad rule in general.....

Original msrps from years ago are not really that meaningful for determining current value I would say. You have to look at current market prices and establish the true condition of the gear in question, again probably always a best practice regardless when buying.

Mapman:

Thanks for your answer. I was thinking of the Onkyo M-510 for sale on this site. It's so beautiful, that being operational, is almost incidental. hahhahaha

Can't guarantee audiogon blue book would have much on that model in that many rarer models do not have a lot of data, but for the monthly fee it is generally a good investment. Audiogon blue book is worth having whenever seriously considering buying used expensive gear.

I'm not familiar with that specific Onkyo but Onkyo has made some beauties that also perform quite well over teh years.

Whow what a wonderful world .Only 50% is true.

Don't forget all the refurbished 20 year old stuff like adcom amps.