Well, as they say, locks only keep out the honest people.
I often chuckle as people spend $150/opening on Medeco and then have 20+ windows in the home. Even "impact glass" only slows people down, it doesn't prevent a determined burglar from getting in.
I've tried picking through the bin to get matching sets/numbers before, and the most I've ever come up with is two.
The cool thing about that build.com website above is that if you already have a lock on-hand (and I think I may have a couple of spares at home) you can order all the new ones to match what you already have. Or, if you have a bunch of deadbolts you can order the knobs to match.
Question for those using keypads...
At my current house I three exterior doors, and have a keypad on one of them. All have deadbolts keyed alike, and all have simple passage hardware at the knobs, no key/lock. From a security standpoint, is this an issue or do we simply default back to the 20 windows scenario?
I'm considering getting keypad knobs at the three doors, and getting deadbolts for all openings, which would allow me to lock out the keypad when I want to such that even if someone had the code they couldn't get in if they didn't have the physical key for the deadbolt. of course, as soon as I do that, I'll wind up locking myself out...