I have been using Shopgoodwill.com for a very long time. Didn't post it here for a couple reasons. One is that when I discovered it, I had taken a hiatus from posting from RFF so I didn't think of it. The other is that frankly, one gets tired of the upturned nose sniff-sniff response one occasionally gets (present company excepted, of course). I understand that many here have lots of money, yay them, but I happen to like cheap gear, it makes me happy.
I have bought a lot of audio gear on Shopgoodwill.com, and I've found especially good deals on large vacuum tube-based gear that has to be picked up locally; not everyone has a truck and feels like driving for several hours to pick up an old Magnavox console or a Sony reel-to-reel even if it does sell for $6 and has incredibly expensive tubes and transformers in it.
I've purchased a few camera items there. The Nikon L35AF that I posted about on RFF recently was purchased very inexpensively there; they typically go for quite a bit more on eBay, having achieved 'cult' status.
I bought a Minolta 5D dSLR recently just for kicks. It was so inexpensive and it works great, and I had a bunch of old Minolta AF glass for it anyway. Now I am looking for a Sony dSLR body that will also work with that glass. A cheap way into a new system, since I'm primarily a Pentax dSLR guy.
However, Shopgoodwill has become popular enough that the screaming cheap deals are more or less over. That's OK with me because I support Goodwill's mission and I'm glad it's working out for them.
I still see 'deals', but you have to spend the time investigating the item listings. These are individual stores that post things as they can, and not everyone who posts is adept at properly identifying what they are listing. So you get 'a group of cameras' and when you peer closely, you see a Pentax SMC 50mm 1.4 hiding in there, or a Canon 55mm FL mount 1.2 (yep, it went for $60, a couple other eagle-eyes must have seen it too). That's where the deals are now, and not everyone has time to dig through all the rubble looking for those hidden gems.
Also, they are not dealers, so don't expect that if it arrives damaged or not up to your expectations that they are going to take it back and fix it or that there is an arbitration process set up to facilitate pathetic attempts at extortion ("I'll keep if you give me 50% back, or I'll leave you negative feedback" means nothing to these guys).
I have had a couple issues over the years. A turntable arrived in quite a few tiny pieces due to lousy packing (I told them to keep the money, it was cheap and again, I support their mission). A couple things never got shipped. One camera I bought recently (Yashica FX-D Quartz), they just credited my money back because when it came time to ship it, they could not find it! Nothing major, and I don't feel ripped off.
So there you go. It's a bit of a smaller field of buyers, so maybe some lower prices. Items are donated and are not being sold by experts, so you get what you get; try to have the right attitude about it and don't expect perfection. Bid based on what you think you MIGHT get, such as a camera needing a CLA instead of a NIB example and you probably won't end up feeling ripped off.
And finally, there are a few people who cannot be pleased no matter what they buy. I advise them against this place. If you think eBay is full of fraudsters and you've never been completely happy with an eBay purchase, shopgoodwill.com will be even worse for you, so save yourself some grief and just stay away.
