Skip White distributor... Only "1 sold" on eBay (?)

Thanks for the info. I emailed Skip White about having sold only one; here's the reply:"We have sold hundreds of these. The reason the ad says 1 sold is that we had ran out of stock on this item and had to end the listing and create a new listing for it. Thanks,
Misty"

Anyway, I'm waffling between HEI and Mopar electronic ignition... I know basically nothing about either one, other than what I've learned here. I sure appreciate you guys help.