If you want to pull this crap go to DP. Here's the deal guys, get an expired Adwords code, and post it to a forum, such as DP as a giveaway, then after people let everyone know that the voucher has already been taken, ad another post offering that you have them for sale at a 90% discount.
To the OP, if this is not what you are doing, THEN YOU SHOULD HAVE THOUGHT OF IT. LOL. BTW. If you are looking to sell a product or service on BHW, there is a procedure to follow, and a forum section specifically for that purpose.