Fair price and what to look for

I’ve been looking at seamaster 30s and was wondering what a fair price Canadian would be? I’ve noticed the majority offered have had redials or touch ups. I’m interested primarily in untouched. I’ve seen all types of prices and was wondering what’s a fair price?

Edit*
50s to early 60s
Sub dial or none

A particularly nice one sold on this forum a few months ago for 500 USD. I pulled a few links for reference from eBay's completed listings that look OK for the most part to my untrained eye. Obviously, price can vary greatly based on case material and dial styles as well as condition and originality. I hope this is a good starting point!

https://omegaforums.net/threads/vintage-omega-seamaster-30.65112/

https://www.ebay.com/itm/OMEGA-Seam...489703?hash=item3d584da967:g:KPwAAOSwBp9adW02

https://www.ebay.com/itm/VTGE-OMEGA...737617?hash=item2398392691:g:yXUAAOSwALtaZyzC

https://www.ebay.com/itm/amazing-om...170110?hash=item4b3389193e:g:JPIAAOSw5dlaTm3s

Take a look at completed listing on eBay. That should give you a ballpark. Of course continue to note the issues with the watches sold (wrong hands, crowns, dials, etc.) With that knowledge you should be able to figure out a fair price. Also check the sales sectio here. I have purchased and sold several things and have really enjoyed the experience.

Generally a fair price for a consumer good is what a buyer is willing to pay for it and what a seller is willing to sell it for.

Thanks for the input! I really appreciate it. I should have been more specific. Ref. 135.007 military dial manual wind. Sorry for wasting your time