Hi az.atty
You have two very nice Breguet’s there. The 5907 has a wonderful dial, but I guess at 34mm it’s a little small by today’s standards. Still, a very nice dress watch. The 3137 is an automatic at 35mm, but not something that you would consider wearing as an everyday piece? Do you want something more ‘simple’ for everyday use? To stick with Breguet, you will see that many here love the 5817 Marine which is 39mm, very versatile and comes with an automatic calibre.
As to value, try doing internet searches and checking out the Sales Corners of the various watch Fora and you will start to get an idea of value. We have a Collectors Market here on PuristSPro where you would be welcome to post your watches for sale.
Good luck with your decisions.
Andrew