Spyderco Native S30V. An unbelievable deal for 40 bucks. No reason to ever regret that purchase. Simple, cuts like heck, and inexpensive and small enough to make for a great EDC knife (i.e. it's not too big or too fancy/expensive to make me fear using it in the dirty warehouse I work in).
Buck 110. A classic and a great knife for 22 bucks. I like it as much as the Native and it performs just as well. So it's an even better deal. A little hefty for EDC, but I don't mind wearing a belt sheath.
Kershaw Leek 1660ST. It was about 40 bucks and is, IMO, the best EDC knife I own. It doesn't pick up dirt, fingerprints, and smudges, so it isn't a knife I have to worry about cleaning every time I take it out of my pocket. It is just the right blade size for most EDC chores, and for my work, is fun and easy to open, and is very sleek, light, and narrow which makes it great for pocket carry. I never know it's there.
Victorinox Super Tinker. It does everything, weighs nothing, takes up zero space, is indestructable, cuts like a mutha, and if I lose it, it's cheap and easy to replace.
Mcusta Kasumi. I paid out the ass for it because I didn't want to wait for it to come in the mail and broke down an bought it at a store after handling it and falling in love. Even though I paid "full price" rather than getting a good deal on it, I feel it is one of the most beautiful knives ever made and still a great bargain for what I paid. It would still be a lot of knife for the money at 300 dollars! This is the only knife I have ever handled that caused an emotional responce from me.
My Opinel was a great deal for 8 bucks. Don't regret that one.
And my next 3 knife purchases will be BM Griptilian, BM Skirmish, and Al Mar SERE 2000. I have a feeling I won't regret those purchases. My stomach might, since I won't be eating very much, but I can live with it
