Two different supply houses have asked me to hand them a bill of materials from the other, to "smack their factory rep with" to get better prices.
Is it really ethical to share Supply House A's numbers with B? Seems kind of wrong, somehow.
If you do it and "A" finds out, you may not get "A"s best price ever again and if "B" was high you were not getting their best price to begin with. If you want good quotes long before bid time, don't play games with their numbers.