My item is a LAB 4000 amplifier that used to retail for $7,999 Where can i find forums where engineers might be interested in this amplifier? It is used to test equipment such as vibrators, and it has surge protectors and a lot of other features? i don't want to pay for a listing or put it anywhere else other than on ebay,
type in your "keyword + forum" into google what kind of people use this amplier. do a google search and send them an email and ask for recommendation if they are not interested because someone else might be.