If you want a single blade knife, those listed above are all good choices. Or, of course, a Case Sodbuster Jr or 31048 slimline trapper in CV.
If you want 2 or 3 or 4 blades and carbon steel, your best bet is with a Case or Boker Tree Brand. Should be able to find most any pattern for under $50. Or just jump right into the deep end and pick up something from Great Eastern Cutlery.
Rough Rider and Steel Warrior make pretty good knives for very cheap. Good fit and finish, blades are sharp out of the box and in OK steel, etc. The nickel silver bolsters will tarnish quicker than better knives, and the bone might bleed dye for a while, but for the cost, they're a great way to try out different patterns without hundreds of dollars.