Try to look for clearance sales on previous models of quality "SNOWMOBILE"
boots such as Klim or Motorfist.
Several years ago, I bought a pair of Klim's on clearance for $125. They eventually leaked around the laces, warrantied them and got the latest and greatest version.
My buddy got his old style Motorfist Stompers for $12 on clearance.
Both are very very comfortable, warm and dry. Wouldn't be afraid to walk out in these if I had too, either.
Quality pays when it comes to boots. Cold wet feet suck.