A thief isn't going to say "man, look at all these comics, I'll just pick the ones I think are valuable" In reality, they'll just take them all cause everyone knows, comics are worth something. They are just looking for something they can sell and get money for, they don't care if it's $10, to them, that's $10 they didn't have before. So if you're really paranoid, put them in a bank safe deposit box and take scans of them, so you can at least look at them when you want. myslabbedcomics.com is great.