Where do you buy your vintage Seikos?

I’ll endorse two vintage seikos. Two and three auctions every day and a varied enough selection to keep all followers interested. Best thing, especially if you’re looking for authentic, genuine pieces, is that they know their stuff.. you just will not find some of the dodgy Franken stuff that is circulated elsewhere (some of those sites already mentioned).

I think it's not really necesarry where, you just need the right intuition.
I recently got my first watch after searching about a year trough all brand (nearly bought a Rolex and a JLC). Then I noticed a Seiko I never saw before. The seller just had two crappy pics (only showing the bezel), but even this crappy pics made me want it. I looked up a bit in the internet, but no picture from Seiko was real good, the watch just looked like a cheap China diver. But then I noticed some user made pics on watchuseek and other sites. Conclusion: The SBDC039 Prospex Transocean is a beuty, and Seiko should hire a good Photographer 😁
Btw, I got it for about 500$ in a very good condition (just the clasp is somehow not original??? but a legit one only costs about 40$...).
I got it that cheap because the auction had a minimum bit and a instant buy option + crappy photos and unresponsive seller made me win 😁

I've actually found the OF sales corner pretty nice. Low volume of vintage Seikos compared to elsewhere, but often above average condition.

My best find was on ebay of all places. Grabbed my birth year Lord Marvel there for a steal. The watch was from a Japanese seller.

https://japan-preowned-vintage.tokyo/ mostly from here

#two_vintage_seikos on Instagram hold regular auctions of vintage Seiko's they describe all their pieces in a lot of detail and come from an enthusiasts/collectors angle

Ebay is still a good place to find Seikos, obviously the chronographs or Grand Seikos can cost a pretty penny, but there is plenty of other Seikos that still fly under the radar.

Just picked up my first Vintage Seiko on ebay. I was going to go through a Japanese seller but had been adding in a USA only search criteria and only limited watches would ever pop up until this early 60's Seiko Skyliner showed up. Almost 37mm so looks great and the picture doesn't do the dial justice. Paid $225 and have to say ebay was a great source if you are patient.

Ebay alerts are the way to go. That's what landed this prize in my watchbox for less than €200!