You're essentially describing a loss leader--in short, every store offers a sale and then when you go looking for the product, they ran out...or whatever. BUT, because you're now in the store, you end up buying other things so they still win. If you do what you describe, there would be some percentage of people who would stay with you....even when you up the price. If you ask for a lot right away, there's sticker shock and they back out. Every customer has a price in their head that they are willing to pay--if you're close to that you got a chance...if not, take a hike. If you put a frog in luke warm water he's OK.... if you then increase the temp of the water slowly, he wont jump out. Keep increasing it till it's so hot he boils but he won't jump out. You're talking about marketing 101, but the big question is...what percent will stay with you as you up the price. The assumption is that you do great work and you dont increase too much or too fast. So, you get in at a low price, they get comfortable with you, then you start slowly raising the price. If anyone says this doesn't work they should drive down to the local Walmart who built a billion dollar business on this concept. BUT...remember, you're gonna pee off the customers that figure it out and they all have mouths. It's your reputation.