I bought these back in February and now I'm thinking of switching to the 100 cell version. These have been great and totally got rid of the gas smell that I had while using test pipes. These may have a couple thousand miles on them and are like new. Add $15. for shipping. PayPal or credit card payment is accepted. These are on a '91. All mounting hardware is also included. I know this isn't much off of the price for a new set, but I had to wait an awful long time for them and these can ship out next day. As of now the price is firm. Thanks.