The old Western boot knives (2 sizes) sold in the $32.00-35.00 way back in the very early 90s. They were good knives but simple and nothing really special, so I would expect something decent to cost more now.
I have a Cold Steel Culloden, and they make (4) versions in the $50.00-55-00 range. They also have had their Peace Keeper I second-quality (cosmetic blems) in their Special Projects catalog for $44.99. CS's knives are a good value and offer good performance at a good price, but nothing fancy. I have a lot of Cold Steel knives as "users".
I've also seen used Gerber MarkII, Mark I, and Guardian on e-Bay in the $45.00 range.
I too love boot knives and still have a bunch of them. Plus, I just sold (3) Randall #2 Fighting Stilletos, (3) #13 Arkansas Toothpicks, and a #24 Guardian. Hated to do that
Hope this helps.
Mikey