Thanks for that. But without any way to configure a minimum price, people will pay $0 or maybe $0.01. Anything less than $1 is basically eaten up by payment processor fees. I don't mean to be rude but this feature is not useful for pay-what-you-want sales right now. Only for donations.
I wish you would consider developing this feature further. A quick check of payment services like Selz, Gumroad, Simplegoods.co, Sendowl all offer comprehensive pay-what-you-want features. Some even offer the ability to increase the amount of your payment, after the product is purchased! (if you decide the product is really good after trying it).