I don't believe you can do what you're asking

But, you can bulk edit all items of the same price at once. So, go through your listings, select all the ones which are, for example, $10 (I beleive you can order them by price, so then it's just a matter of clicking all the ones in the group) Then bulk edit that group, change all their prices to $11 at once, save, and repeat with the next price increment. Not quite as easy but far easier than doing each one individually.

Hope that helps