Is your MacBook Air looking a little lackluster next to Microsoft’s new Surface Pro 3? If so, the company wants to help. Microsoft Stores are offering Air owners up to $650 toward the purchase of a Surface Pro 3 with the trade-in of their Apple hardware, according to the promotions page on the Microsoft Store website.

To take advantage of Microsoft’s generosity, you’ll need to bring your MacBook Air to a Microsoft Store to be evaluated in person, at which point you’ll learn the actual trade-in value of your old laptop. The company warns that “condition, documentation and accessories may affect value.” You’ll also be responsible for removing all personal data from your device before bringing it in.

Even if Microsoft deems your Air worthy of the full trade-in value, you’ll have to cough up some additional dough to get your Surface. The base Surface Pro 3 starts at $799 and features a Core i3 CPU and 64GB of storage. If you want a keyboard to restore the full functionality of the Air to which you’re bidding goodbye, the Surface Pro Type Cover is another $129.99.

Still sound good? Microsoft will accept MacBook Air trade-ins at its retail stores until July 31.