Help me with pricing for an app idea

[Ankesh]

Thank you for reading about my idea and helping me evaluate if it can be monetized or not.

So I was getting a small app developed for my own needs. And am thinking if there would be interest for others to buy it too.

The app is simple: it pulls out email id of everyone who unsubscribed from your mailing list in the last week. And creates a targeted facebook ad campaign ("We miss you, please give us another chance") to get them to resubscribe. The idea is to automate this entire thing. Set it and forget it.

Would you pay for something like this? If so, how much per year would you pay?