ignition coils
 

I have a set of ignition coils for sale, Good condition $50

Are they MAZDA OEM or after market, and how many miles?

Mazda OEM, had got them with a tune up at a Mazda dealership last year, got about 20,000 miles on them

What version are they, A B or C?

don't know for sure, but I got an '05

I thought these things interchange?

There are 4 OEM versions, Original, A, B, and C. They are interchangeable, but the later versions are supposed to be stronger and last longer. It matters, because a set of Original coils are underperforming badly and/or about to die at 20,000 miles.

C's probably have more life left in them.

If you are convinced that the coils are fine, I'd recommend doing a timing light and spark test on them and post a video showing the results of each. It is unlikely that you will find a buyer without that since the general forum assumption will be that they are, at best, 2/3rds of the way through their lifespan. Given the penalty and costs of a prematurely failing coil, people will be wary about spending $50 to get coils that are on the brink of death since you can get a new set of original coils for ~$120.

Just a tip.

well price lowered to $25