I worked at a large mining operation that used two way radios extensively, as a radio repair tech. TK805d-1 was an excellent mobile radio. However, in one instance when a pickup truck cab instantly filled with water from a large and rather sudden pipeline break, the 805d did not survive. Fortunately tha same could not be said of the driver who received only an unexpected shower.
THese units can be PC programmed (using DOS, the correct software and programming cable available for cheap) or they can be field programmed by moving an internal jumper and pressing the correct sequence of keys on the radio face while power up.
They are old but still do all the CTCSS tones and the digital codes as well. The plain TK805 (without the "D" suffix) only does CTCSS if so equipped with an add-on tone board, and is not PC programmable. However, these are still useful radios. They are programmable by moving the internal jumper only.
As stated by spd640, be sure of the frequency range before you purchase these radios. For GMRS use, 450-470 MHZ.