The CV is an early unit (first unit with vibrato - earlier ones used two generators to get a tremelo effect, but did not have vibrato).
Largest problem for your use: the CV not only does not have an amplifier nor speakers (neither does a B3 for that matter), but it also does not have the high voltage DC supply for the tubes in the pre-amplifier built in it. Hammond used the power supply of the tone cabinet to supply the high voltage DC. The tube amplifier Leslies also can provide the needed high voltage.
The CV does not have percussion like the B3 or C3. Otherwise, it is a full size console instrument (by the way, the "B" series was made for home or band use, the "C" series was the same instrument except for a "Church" type cabinet, usually more ornate, and with a modesty panel.
Instruments with an internal amplifier and speaker included the A100 and L100. the M series (M, M2, and M3) were spinet organs (smaller keyboard, only 13 pedals instead of 25 pedals), and had internal amplifiers and speakers.
Personally, I would think that $795 was a bit much for a CV, especially if it does not come with a cabinet. Now, if it came with a 2-speed Leslie like a 122 or 147, 795 would not be a bad price (assuming that the instrument isn't completely worn out).
HTH,
Jim