This depends on how the salesperson is compensated for the sale.
If the salesperson is paid $50 for each traditional BC they sell and $20 for each BP/W they sell, they would not try to sell the BP/W unless it was clear the customer had their heart set on getting the BP/W.
I suppose that would be true, but it would be a curious practice IMO. In the shop I use, sales people are paid for the time they are in the store, with no individual commissions.