i always get a smear of metalic paste on the magnet plug end when changing oil. i've had mine since 4000 miles and now have 17,000.
here's the email confirmation i got:
Code Description Quantity Unit Price Unit Tax Net (excl.)
1002M 1002M DRAIN PLUG 14MM-1.5 MAGNETIC 1 $3.60 $0.00 $3.60
2402 2402 GASKET 14MM ALUMINUM 4 $0.23 $0.00 $0.92
cat