I got this Husky pocket knife from Home Depot for $7!! Stainless steel, can be sharpened, dual edged with lifetime warranty (no questions asked) little pocket knife for seven... $7!! How can you go even wrong with it? You can get that and the matching box cutter for about $17 on amazon...
I can't post a link to it but on Amazon, you can search for: "Husky Wood Handled Folding Lock Back Utility Knife, and 3 in. Sport Lock Back Pocket Knife Set"