I bought a 12v Pertronix unit for $65 about 10 years ago and a 6v Pertronix unit about 5 years ago. I also bought a complete rebuilt distributor for $69 as a back-up "spare" (about 5 years ago). The distributor came with points, condenser, and cap - I have added a spare vacuum-advance unit.

I have been carrying the rebuilt distributor as a Pertronix back-up when I go on a long trip with either truck. Never had to use the backup but it's nice to know I have it.