I would have walked away also Jim. We did an indirect TT (prime) (Costco) on the Performer last night and were very happy with it. Always seems better when we do it ourselves.
Our Sam's Club sells tri-tip but they are always sliced them into strips. I just ask the butcher to give me a few whole ones and they trim them up for me as well.
$10.99/lb at my local Wegman's. I will admit, it is very good tri tip though. We can get it for $5.99 at Trader Joes, but to me the quality isn't very good. The ones I've bought there were always tough and chewy. The ones at Wegs are CAB with nice marbling and great flavor.