Actually by not posting your price upfront, is actually wasting time for both you and the client. You see if I have a budget for a solution of 60USD and your solution starts at 6000USD I know to look elsewhere. But if you don't what will happen is you will collect my email to "stay in touch" about a product I have no use for, increasing my spam by 1. My email address in your mailing list is wasting my inbox space and your time. In fact your mailing list is probably what you use to give your sales person. But it's counter productive instead of having 100 potential customer who have accepted your pricing for your product, now you have 10000 people who may or may not be interested. So now your sales staff have to spend time chasing up cold leads instead of focusing on 100 customers whom they have a higher chance of closing. So you see by not posting the price you are causing harm to your own sales pipeline and one more person to make you as a spammer.
Chances are if you need to contact the company for pricing details their product is not going to be in the sub-$100 range (or possibly even the sub-$1000 range)
