If your prospect is already using a similar product or service, then making the decision to purchase this particular item is part of their job. They are supposed to do their job to the best of their ability. Part of that would be finding the best for the least, staying on top of new developments in the field, exploring options, contingency planning.
Meeting with you works to your prospect’s advantage. By introducing yourself and your product or service, you are helping your prospect to do their job.