I'm not sure how great the deal is, but I'm down to one utility knife for the whole house. No, I don't know where they go, but I suspect they are with those socks.
But I digress. Home Depot has a 5 pack of folding utility knives with 100 blades for $20. They are of nice quality and have a good locking feature for the blade itself (as well as the folding mechanism). Item# 845833
Just thought I would pass this along. I use these for the kitchen junk drawer, garage, misc shop work, etc. not necessarily heavy, hard cutting.