Recently picked up a Pentax IQZoom 170SL (35mm AF point and shoot with 38-170mm zoom lens) for $3.75. Looks brand new; only needed a new CR2 battery. Got a roll processed at Walgreens and boy it's got a good lens.
Also got a Pentax MZ-S new old stock for $100 at a local camera store.
a small pile of filters, mostly 52mm in various colors. Some grimy, but cleaned up fine. Plus a Gossen Luna-Pro SBC meter. All for $50, and here's the best part, TWO nikon F2 plain prism finders, the DE-1. One is dented and funky (KEH UG at the very best, but probably worse), the other is really nice. Both work equally well on the camera.
28mm Zeiss Biogon for Contax G-series, 200 euros (~$250), online, not garage sale, but still a great price!
A Konica Auto S3 for $20 at a local shop. Has the common battery wiring issue and I'll be sending it to Greg Weber for a CLA sometime this month.
A few things I found in garage sale which I think a good deal.
1. Minolta spotmeter M for $2 works perfectly.
2. Pentax MX with 50mm f/1.4 lens for $5. Everything works except the flash sync. Neither the hot shoe or the pc sync would fire the flash.
The following are not that good of a deal but good deals.
1. Canonet QL17 GIII for $5
2. Olympus 35RC for $3
3. Weston Master II meter for $2
All work fine.
I bought my Olympus XA at a church sale for $3. I also found a nice Rollei XF 35 for $7.95 - these are vastly overpriced.
Last year, I bought six folding cameras for $300. All were in excellent condition, except one that needs its lens helicals relubed. The six are Super Isolette; Isolette III with an f/3.5 Solinar; Super Ikonta 531/2 (6x9) with a coated Zeisss-Opton Tessar; Certo 6 with a coated Jena Tessar; Balda Six and a Bessa I (6x9) with a coated Skopar.
More recently, from eBay: A Contax III with a working meter; Olympus 35 RC; and Agfa Optima Ia for $49. And then a clean working Rolleiflex SL35 body for $50.
I am yet to see a camera related anything worth spending $1 at a garage sale... not that I frequent many but will stop occasionly when I see some balloons and a sign!
Not a great deal in terms of pennies on the dollar... but a game-changer...
One of my most significant garage sale finds was a 6-foot stainless steel sink for $50. He had a speed graphic too, but I didn't exactly need another camera. Not as much as I needed that sink.
Once when I was dead broke in college, I was looking at one of those cases of junked cameras that they often have at antique stores. Lots of contaflexes, overpriced, and undoubtedly dead, Instamatics, a 2x3 graphic, a Ricoh or two. Then I saw in the back a little dumpy silver SLR- Miranda, Orion Camera Company.
I bought a GS-1 with the profits.
In the last two years, I've found two Polaroid Miniportrait cameras - the 203 two lens model and the 403 four lens model - and a Polaroid Spectra MB, all in working condition, for a total of about 8 bucks (I live in Tokyo, so 800 yen). The Spectra was 100 yen in the rummage shop near my house.