atleast in my area, i find cb radios all the time at goodwill. its just an idea, but i payed 3$ for a HR2510, and 5$ for a midland 77-888, 5$ for a cobra 19 like you said.
my HR2510 was the problem child of the group, needed 2 caps replaced, but i picked up a uniden 520XL(1.50$) and its finals where burned up and had a modulation mod in-place but i dont know, it did not work. so broke it apart and used it for donor parts (i now have like 20 cap replacements for my HR2510 and its under rated 10vlt caps) for my HR2510, and plenty of IC chips crossed over, so basically, if it works and has a mic AWESOME if it doesnt work gut it and its still AWESOME, i also wheel and deal them to friends for things or services,
trader my cobra 19 and a power supply i got at goodwill (8$) works perfectly and what not, for a cobra cam 89 base station, he wanted a 40ch setup that fit on his desk way better, so it did so, then took a mic i got wired it for a cobra cam and freed the other power supply up. now my midland 77-888 is on my power supply and my HR2510 is back in the car after its first repair. need to re tighten screws again (meter problem) but perfectly great 10m
moral of the story is, you cant go wrong with buying used cb radios as long as its not some off brand pos, im going to trade my bud after i mod my uniden 510XL for that cobra 19 back. he wants something with a little more modulation.