Number one looks like a 1940's 30T2, what's the size? I can't tell from the picture. Regarding value, when other things are equal, the bigger the better. If it's 35mm or under then I'd say it's expensive ( for me )
Number two is just an ugly monstrosity, Awful redial, dreadful mis-matched hands and a badly over polished case. No value at all there
Number three is more interesting, it may be a cal 267 ref 2990, which is actually quite collectible. I'm not 100% certain so a photo of the inside of the case back will provide the actual reference number. If it is a 2990 then it isn't a bad buy at all even at the asking price.
It certainly looks like this one sold here a few years ago:
https://omegaforums.net/threads/omega-seamaster-ref-2990-ranchero-case.26835/Click to expand...