25$ apiece plus shipping. i have 3. my car doesnt require them but MSD told me they did because i had a no-run situation. the box ended up being bad in the end. they are brand new, two never used, one has about 50 miles on it. the one that is used had a couple of the trigger wires lengthened but i took out the extra wire and couple them back together at the stock length. these adaptors are about 70$ each new, and these things are not even used! i have the instructions but not the packaging for them. email is [email protected]