Here's a technique I've found useful for testing pricing, especially pre-launch. We're always tempted to ask, "How much would you pay?" but it turns out that question gets lousy feedback, because everyone wants it free. Rather, I found it effective to 1) pitch the product and wait until they ask "How much?" then 2) try a number, use the present tense, "It's costs $99/month" and 3) see if they flinch. If not, then try a little higher next time. 4) repeat.