Some things in life cost just the right amount of money.
Have you ever noticed it costs one to two dollars to get a new key cut for your apartment? How cheap is that!? $One gets you a whole lot, if you really think about it. It gets you your home. Access to your things. Security to keep others away from your things. Also, it's not as if a key is a cheap flimsy little trinket. A key is thick hard metal that you can use to cut through twine if you really need to. You can stick a key in someone's eye and they'll be none too pleased. You can ruin a very very expensive sports car with one little key. A key can represent everything. A key can get you into your lover's apartment and into their lives. A key can help you start that motorcycle on top of a moving tractor trailer truck so that you don't need to call up your operator and get a
how-to-hotwire-a-motorcycle program uploaded into your brain. A key can get you into a can of sardines and out of a pair of roller skates.
And for all that your friendly hardware store clerk only asks you for one little dollar. How cool is that?