TC3 Thanks, TC3. Glad you liked my blast from the past. The best thing about that old Hammond was the keyboards; great feel. As for that Hammond sound, Native Instruments B4 does a really great job, with lots of recognizable presets based on tunes from bands, Procol Harum, Santana, Traffic, Allman Bros. Sly Stone, and more; very configurable to use one, or even two, midi keyboards; plays as a stand alone or VST. A lot less money than a B3 and Leslie, and easier to carry.
If you're set on the real thing, an M3 gets pretty close to the B3 when you hook up a Leslie, even a little one like the 147. I bought mine in the mid 80s from a dealer for $500 with the bench, and included the addition of a line out, and delivery. They're out there, and I feel it's a buyer's market.