I'll second that Saturday Audio Exchange suggestion.
I wish I lived close to them. I've purchased several items, both used and demo, from them over the years and have received nothing but stellar service, first from Randy and more lately from Charles, I believe.
I always check out ther used page. some good stuff shows up there. Naturally, it'a more than ebay or a garage sale, but they do guarantee their stuff, know how to pack it, and you know who you're dealing with.
I would love to have access to their physical store.
Oh, chi, remember that sound is a personal preference. Don't let anyone tell you what sounds good to you, particularly a salesman. It's no big trick for speakers to last at least 15 years. The trick is finding one you can live with for that long.