Help sourcing vintage Omegas

I had the good fortune to inherit a few watches from my uncles (a 1987 Rolex Datejust, a 1955 IWC, and a 1960s gold Omega Seamaster). I love the watches, and have become very interested in adding to my incipient collection. I’m especially taken by vintage Omega models from the 40s through 60s. I recently purchased a 1942 Omega RAF pilot’s watch on eBay from an English dealer for a few hundred dollars, but I’m not entirely comfortable purchasing vintage watches online, especially from sites like eBay - just too many opportunities to get burned, in my view (even though this one worked out OK). I’ve checked my area in upstate NY but none of the local dealers carry vintage models. I’m wondering about other ways to find good vintage watches, and would appreciate any guidance on this. If online is the only reliable way these days, then are there certain sites that are trustworthy?

Thanks in advance for any advice you may have!

Start here in the sales forum.

Take your time (get it) and start reading reference material and searching sold Ebay listings. This site is a wealth of info. While your doing your due diligence, build your war chest.
I made a lot of money flipping watches and the profits helped pay for the watches I really wanted. It is a huge commitment to do this and not make bad mistakes.
I think there are still opportunities for one who has the time to commit.