I would have done this, too. Of course, it wouldn't have mattered b/c of your Dish issue but it would have showed you tried to contact him.
Hope all works out with seller/trader.
If what you wrote is true, then that's a deal. I have found "better deals" after telling someone I would take something but I always went thru with the original agreement and never mentioned it to the seller. A deal is a deal, regardless. I take pride in my feedback and if we don't all value...