Well... in that price range I might suggest a Case brand pocketknife. Unless you get into upper end handle materials, most of their production knives can be found under your price range.
It's hard to recommend something with so little to go on. How many blades do you want? How big of a knife are you looking for? Do you have any preference of handle colors or materials? Jigged or smooth?
One of my favorites is the Case Small Texas Jack, which is 3 5/8" closed and has a main clip blade and a smaller pen blade, both hinged at the same end. There is a 3-bladed version of the same knife that is one of several Medium Stockman patterns.
The mini-trapper is also a great Case pattern. Just a little bigger than the Texas Jack with a secondary blade that is a full length spey or wharncliffe, depending on the model.
If you want something in the smaller sizes, the Case Peanut and Mini Copperhead are popular, and in the same general small size range are the Small Stockman and Tiny Trapper patterns.
Buck also makes some nice users in several patterns and sizes, 300-series. You don't get too many choices in handle materials (black or yellow Delrin and a couple of wood handles) but they have 1, 2, and 3 bladed versions in several sizes.
A little bit above your range are the Great Eastern Cutlery products, though some can be had for under $80 depending on the pattern and handle material. If you are willing to pay up for quality they are worth their price.