"To be eligible for trade-in, device must power on to be considered working. Water-damaged devices and devices with cracked screens are not considered working devices for purposes of this offer."
All trade-ins are final and provided as part of the "Recycle for Rewards program" from CExchange LLC. The trade-in is limited to one trade-in per purchase.
To get the maximum ($650) value, users have to apply the store credit toward the purchase of a Surface Pro 3, the most recent model of the company's Intel-based Surface tablets. The Core i5 version of the Surface Pro 3 began shipping on June 20.
There's no information on the Microsoft store site about which models of MacBook Airs are eligible for promotion.