AFAIK the ignition module is all that he sells, but I'm sure a PM would clarify the issue.
The ignition module turns the points into a low voltage switch, nullifying the pitted points problem.
However, if for some reason down the road, you wanted to remove the module (transfer it to another bike maybe) than new points would be requisite. So I suppose it's down to personal preference. It's been a few years since I've had to buy points, so I don't know how much they cost now. However, I do know that when I bought them way back when for my '71 SL175 they weren't too terribly expensive. Personally, I'd find the cheapest set of new points and get a HM Ignition to go with them.