Here's how you do it. Find out the minimum you're willing to receive and then find out the maximum they're willing to pay...then, get the amount in the middle of those two
why don't you just charge the maximum they're willing to pay?
Well, here's what I'm thinking. Say they know you're willing to accept as little as $4 and you know they're willing to pay as much as $10.
Their first offer will be $4 and your first will be $10. After months of arguing, you'll negotiate to $7. That's why I figure you just save the time and get to $7 at the start