You might also look for older used watches with ETA 2824 or 2836 movements on eBay etc. Make sure there is a clear picture of the movement and look for rust, ruined screws, scratches etc. Rust often collects around where the stem enters the movement because of a defective crown, also look for water spots on the dial.
Look for nos obscure brands with ETA 2824/36.
About 12 or 15 years ago, I stumbled into some new in box 'Oniss' brand day/date watches with ETA 2834 for $65 each in fancy wooden boxes with b/p, but they are all gone now.
Edit 10-27-22...found four of them, pic below.
USA Walmart stores sold 'Swiss Gruen' automatic watches for a while about 15 or 18 years back with ETA 2824 movements and they blew them out to wholesalers when they did not sell. I still see one for sale now and then for a fair price....$120 or so.
Here are two examples of what to look for...
Gruen Swiss Automatic Watch, Running, Sold as is #1160 | eBay
mens Gruen Authentic ETA 2824-2 Swiss Movement Automatic 25J Jewels watch GSM043 | eBay
Here is one on Etsy at a pretty good price...
Rare Gents GRUEN SWISS 25 Jewel ETA 2824-2 Automatic Display - Etsy
They also made a diver style but they do not come up for sale very often...
wristwatch: PREOWNED GRUEN SWISS AUTOMATIC GENTS DIVER'S WRISTWATCH (beautifulwatche.blogspot.com)
"A good deal is where you find it."
Show and Tell...
Here are a few of the watches I bought for a small percentage of their list prices years ago just to get the movements. Many are worth a lot more now than I paid for them back then.
Nos Oniss with ETA2834-2:
The Oniss watches came in nice wood boxes. The $199 tag was our store price, retail prices were crazy. Btw, I paid $65 each for them, I changed it above from $60 to $65.
Nos Jaques Prevard dive style with ETA 2846:
Ole Jaques needed a lesson in bezel compatibility. Had 10 or 12 to begin with but I used/traded/sold/gave away some over the years.
One ETA 2824 OCTO (!!) and a few ?? Can't remember the name and I have already put them up. All nos.
When was the last time you saw an OCTO?
Nos Swiss ETA 2824 Gruen:
Odds and ends:
And one Val 7734 for a Toot MC project. When? Never.
Nos ETA 2879, one watch and five movements:
Put a nos ETA 2879 in my MBK '5512'. They run at 21600 bph and are good for vintage projects.
If I posted what I paid for them, there would be a bounty on my head.