So I stopped by to see what they might have and I found a large selection of regular door knobs that lock, a bunch of deadbolts with cylinders and a bin of sargent and greenleaf commercial door handle sets with the lock in the door, not in the handle. Most have keys.
All used, and it shows.
Any suggestions as to what to buy, what else to look for, and what to pay? I'm just starting so I still want easy locks but I'll pass some along to members here if there's good ones I should look for.