I've had a few and the last one I got was ultra cheap on sale (I think it was $10). It's a Sears Craftsman model 82141. A friend of mine bought a $35 Sears Craftsman one and we both agreed that my $10 one is better.
I would highly recommend it. A feature it has, and I don't see on TyphoidHippo's, is "audible continuity". That means it will make a buzzer type sound when a connection is made, and that's very useful when you are testing cables. Otherwise you have to watch the meter when you test for continuity and that's often a pia.
The only main thing that that tester doesn't do, and most of them don't, is measure amps. But that tester is fine for testing your house electrical, your car battery, house batteries, mic cables... all kinds of stuff.
I found a small zipper bag, like a mic case, that fits my meter and I keep it in that. This last few years I've been getting small bags for all my tools and it's nice when you go to use them and they aren't all crapped out.