Hi,
There is some interesting once-near-high-end audio equipment available on eBay. How much deteriation might 10 to 20 year old units (preamps, for example) suffer? From a previous query, electrolytics can deteriate with time. Condition will vary from unit to unit but a general opinion would be helpful: is a unit rated highly when new and now selling for 1/4 its original price a good buy? Obviously, it is not possible to audition the equipment and not all sellers offer returns so it is a gamble.
Thanks, Gary