Here, knives can be bought.

Info
A beautiful knife. The Stiletto compact, fast, and easy to use. The 5.3 inch blade comes straight out and retracts straight in by the push of the button located near the top on the knife handle. The power of the outward thrust is strong enough to penetrate skin, so it can be easily used to kill. Just press the closed knife against the victim, push the button up, and in goes the 5.3 inch blade into them.
Blade Length: 5.3 in.
Overall Length: 10.1 in.
Closed Length: 5.5 in.
Price: $125

Info
The Scorpion is a good reliable knife. It is opened like a normal knife, a pull on the side to get the blade out. It is a lock blade and won't close when cutting.
Blade Length: 4.0 in.
Overall Length: 10.1 in.
Closed Length: 6.1 in.
Price: $50

Info
The Fat Cat is a small, yet wide knife. It opens like the normal knife and has a lock blade. It is very easy to conceal, only being 4.1 inches long when closed.
Blade Length: 2.4 in.
Overall Length: 6.9 in.
Closed Length: 4.1 in.
Price: $40

Info
The Drale is a good knife with a long, sharp blade. It it long and rather narrow. The long blade is good for deep penetrations. The Drale opens like a normal knife and has a lock blade.
Blade Length: 5.3 in.
Overall Length: 11.1 in.
Closed Length: 5.7 in.
Price: $100

Info
Affordable and a good weapon. The Brass Knuckles are great for close range hand to hand combat. The brass can block stabs from knives and delivers a solid hit when you land one on their face. Extremly good for getting information
Price: $30

Info
Like the Brass Knuckles but with a bonus feature, Spikes. Deliver more pain per hit.
Price: $50

Info
Like the brass knuckles, just add a knife. Highly effective in hand to hand combat. You can either hit them to just knock them out, or slash them for a kill.
Blade Length: 4.5 in.
Overall Length: Varied on closed fist size
Price: $100