is this a scam?

I don't know if any of you have recieved a request like this so I thought I'd run it through the forum. This is a reply I had from a web client looking to pay for an item I have advertised. I would be interested if any of you have had similar replies.

Thanks for the Co-operation,The payment package will be made out to you by a certified cashiers check through my client,my client will be sending you the check of 2500,-$ of which he was owing me from the last transaction we did last,so you will be getting the check of 2500,-$ AND YOU WILL SENDTHE balance to my shippers who will be coming for the pickup,so i will like you to give me the Details Below for the Payment.........