Fred
I don't know much about your area (local) as far as relationships with local business. Owners and where product's area purchased.
I think he's trying to save money and sounds like you still have a shot at doing the work (if cheaper $$$$ material is chosen) at least your still in the negotiation stages.
That is not really "Bid-shopping".
There is a difference between looking for savings that will get passed on to the end user and back door pricing where the GC'S end up with the money. (Normally the customer does not see that money!!!
That's the big problem.
Jump in find some or suggest some savings and get the work.
Good Luck
