I've never found a pair of waterproof membrane boots that will stay waterproof for more than 3 maybe 4 years if I don't wear them much. At one point I had a couple pairs of boots laying around, not waterproof at all but the leather and soles were fine. I just couldn't bring myself to toss them. Now, before reading any further, take note that I am REALLY hard on footwear. I had a pair of Wolverines that started leaking after 2 years, but my buddy who I hunted with had the same boots(bought at the same time too) and he got 5 years before they leaked.
About 3-4 years ago I splurged and bought a pair of the Filson uninsulated boots. They are not waterproof, but oiling them with the Filson oil they are resistant. I wouldn't want to go clogging through a stream, but I haven't noticed my feet getting overly wet walking through grass. But then again, when I was buying waterproof boots I would have a fall that I had wet feet all the time because they never started leaking in the spring or summer. NOOO, lets wait until the first mud puddle 10' from the truck on opening day. I would never go back to waterproof membrane boots again. If I'm hunting somewhere there is that much water I put on the Muck's. Wool socks are all I need with the Filson's. Oh, and I do get a ration from everyone I know because I paid $400 for a pair of boots. Worth every penny.
I will say on the cheaper side, I got a pair of Carolina work boots last year that were "waterproof". I wasn't looking for waterproof, just soft toe work boots. The best fitting just happened to have a membrane. I didn't expect them to be waterproof, but I wore them in the deer shop one day. All the hosing and blood and my feet were dry. But I don't expect them to last long since it is just a membrane.
Remember, shoot straight and shoot often.
Good... Bad... I'm the guy with the gun.