Well, I've built circuits I could fit in a film canister that seem to work pretty good. I guess for less than $10 a guy could find a way to build one that could go in an Altoids tin easy enough.
Hey, they're not the best thing going, but they never quit. The best part is finding suitable antennas and ground connections. If you play around with them a little you can really pull in some weak signals with them.
You're right, though, I don't ever see any commercially available ready mades. This is for those who like to know how their gear really works, and how to make it go. For $10 you can buy a nice transistorized radio, new even, and not have to screw around with anything but the batteries.
Still, I do like getting something for nothing. Kinda like using sunlight to start a fire. <img src="/images/graemlins/wink.gif" alt="" />
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The ultimate result of shielding men from the effects of folly is to fill the world with fools.
-- Herbert Spencer, English Philosopher (1820-1903)