You said under $100? I just picked up...OK, it was in my Christmas stocking, a Gerber F.A.S.T. 06 off Ebay brand new for $50 ($60 with shipping) and really like this knife. The G10 grip and finger choles are very comfortable. The knife feels very sturdy and heavy without being cumbersome. The best part of the knife is the Finger Assisted Open. The knife "snaps" out at about 10 degrees into open position, but also has a safety lock in open/closed position. It is 440 steel if I read correctly, but has a VERY sharp edge and the blade size is good for multiple uses. I would highly recommend one.
I call mine my "week-ender" because I don't carry it in my work clothes, but really like it for evenings/weekend use.
mmmmmmm Tanto Blade.