The idea

“Hi all Full just opinion I’m making an app where there 2 main features 1)can see all the marketplaces at once. Fb eBay Craigslist postmark etc 2) set alerts for item and price. Will notify when it becomes available. Or if it sees an older listing that you might be able to negotiate with the user Is this app something you would purchase on a monthly payment ? If so how much $10? $20. Just curious on feedback Thanks”