Just checking parts places online, Autozone and O'Rielly show one for about $297, 1sttoyotaparts shows one for $305, napaonline shows one for about $255. The ones from Autozone, O'Rielly and NAPA all appear to be from the same re-manufacturer because the description is verbatim and the photos are the same.
Anyway, in an effort the verify the NE, G1 and G2 signals, I got out a scope to probe those signals. When I cranked the engine, the tach needle moved, which it hadn't done in a few days of trouble shooting. So I put the rotor and cap back on the distributor and it fired right up and runs great. And of course the NE, G1 and G2 signals look like they should.
This is an aggravating problem. This car has done this to me several times since I bought it. Usually it'll happen when I'm just driving along and it'll shut off like I had turned off the key. Normally it will start back up after a minute or two and not happen again for a long time. Last time it happened was roughly three years ago and that time I added a ground wire from the igniter to the intake manifold. It never seemed like that made sense for curing the problem but the thing fired up and has run good since. At least it did until last Thursday morning when it died as I backed it out of the garage to go to work.
It's hard to get a good picture of the inside of the distributor, but the lower pickup module looks lightly charred: