Perhaps my best find came the other day: Goretex Marmot bibs for $4. Couldn't tell they had been used. $550 new!
Other memorable mentions:
-Lightly used Goretex Marmot one-piece alpine suit, $25. $750 new.
-Lightly used Goretex Marmot ski pants, $10. ~$200 new.
-Lightly used Goretex Marmot jacket, $9. ~$200 new.
-Nearly new Goretex Marmot jacket, $4. ~$200 new.
-New Quiksilver ski pants, $4. ~$150 new.
-Barely used Patagonia R1 fleece, $8. $130 new.
-New Kawasaki cloth motorcycle panniers, $4. $185 new.
-New Trek bike pannier, $4. ~$50 new.
-New Soft Star shoes, $4. $75 new.
-New Royal Robbins hooded shell, $9. ~$85+ new.
And that's just off the top of my head. I have found too many other nice pieces of performance fleece, wicking layers, and casual wear to mention. Alf, Columbia, Patagonia, Royal Robbins, Mountain Khakis, The North Face, Prana, and more. Most of it has been lightly used. Some has been new. On occasion, I'll get otherwise nice and quality pieces with little holes for $1-2 after I show a store worker.
That's just for me. My wife has had great success too...though she goes less often than I.
I enjoy thrift storing. There's always the element of surprise. Never know what you're going to find.
EDIT: It was brought to my attention in another thread that I was bragging. I'm very embarrassed this post came across that way. I apologize. It was not my intent. It was solely to inspire others to start thrift storing themselves. The many benefits are worthy of another thread. Also, the morality of paying so little for this gear was mentioned too. I would encourage that the prospective thrifter donate back to these stores. I do, freely and often...things that are in most demand such as regular clothes (adult and kids) and housewares.