Radiacode is up to model 103 now. Nice if you want to identify gamma emitting radioactive isotopes.
There is also the BetterGeiger S-1, also good for gammas. Unlike the Radiacode it doesn't do gamma spectrum out of the box, but it's also way cheaper.
If you want to look for radioactive contamination, you probably want a survey meter that can detect alpha, beta, and gamma. There's a lot of cheap meters that can do beta and gamma, such as most of the GQ series. You have to go somewhat higher end to get alpha capability since it requires a thin wall tube or pancake tube. They're also more fragile than other types of detectors.
I find the beta/gamma detectors are fine for looking for most radioactive things in antique stores or old storage closets. If I could justify the expense for what is essentially a fancy gadget toy, I would get an alpha capable Gamma Scout, SE Monitor 200, or Mazur 9000. All of them are in the 500 to 800 range.
it all comes back to what do you want to detect, and why. Make beepy noises and flash for common radioactive stuff, actual dosimetry, site surveying for a governmental organization, continuous environmental monitoring, checking for radioactive contamination after an accident, or to know how fast you're going to die if you survive a nuclear war first strike.