A lot of people are listing obviously crappy knives with very low prices. I'm going to try something a little different and list knives that you would have a higher expectation of given their higher price points.
Here are my picks, in no particular order.
10.
Cold Steel XL Espada. Too big to be practical for anything other than scaring your mother. Hefty, but feels cheap. With an MSRP of $469.99, you'd have to be both wealthy AND out of your mind.
9.
Benchmade LFTi. A knife that had so much potential. Up-down and left-right blade play right out of the box. Not exactly the ideal send-off for the late and legendary Bob Lum. $270.
8.
Spyderco Poliwog. The lock will fail if you add any kind of lubricant to it. The clip is far too tight for a knife of its size. Poor blade and handle ergonomics, so it's useless for cutting. And all for just $200.
7.
Emerson CQC-15. A blade shape that isn't quite good for piercing, or cutting, or utility work. And welcome to Re-sharpening Hell. Your sins will be punished in the order in which they were received. And as always, when buying an Emerson knife you're automatically entered into the EKI "Shit-and-Finish" lottery. Will your knife have burrs, uneven edges, dremel burns, and other unsightly blemishes that can only be found on a "hand-ground" (see: CNC'ed) knife? Buy one and find out. $240.
6.
Spyderco SpydeRench. Loose fittings, small components that were easy to lose, and about as heavy and pleasant to carry in your pocket as a wad of elephant dung. The detachable knife was a nice feature, but certainly not worth the price of admission. $150.
5.
Buck Rush. Useless paper-thin liner lock that would easily disengage. Secondary lock that was guaranteed to fail. Very slow deployment for an assisted opener. $80.
4.
Gerber 06 Automatic. Rubber bands on a Buck 110 would make a better automatic. Poor heat-treat on good steel led to blade chipping. More play in this thing than Six Flags. The world's most sensitive pivot and spring mechanism. This thing stockpiled dirt and grit. About $200.
3.
Benchmade MPR. This knife has bigger balls than you do - detents that is. Absolutely impossible to open if you're placing pressure over the detent while you're opening it. Extremely heavy for its miniscule size. Blade play in all directions, and the framelock setting is very shallow. $235.
2.
Emerson Combat/Super Karambit. Emerson's patented "Shit-and-Finish", left-handed chisel grind on a knife meant only for combat, and an open karambit ring which would flex and on occasion cause the liner to jump off the scale. $250-300.
1.
Kershaw ET (External Toggle). External toggle mechanism that would actually CUT YOU as you opened it. The pocket clip was integral to the opening mechanism, meaning it would come out as you loosened it from your pocket. Worst opening mechanism by far. $100.