Selling my App, need advice

Hello everyone,
I've been a developer for around 4 years now and I decided to sell my app and get out of the business, has anyone here had any experience selling their apps?
I've contacted several companies all with quite different offers in mind. I got the largest offer of $30k USD from a company called WePurchaseApps, has anyone here heard about them? My app is a simple productivity app that helps students prioritize their workflow to achieve high results while studying which I used in...

Selling my App, need advice

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