Best Buy Stores: Trade-In a Working Laptop, Get Minimum Gift Card $40, plus $160 coupon for Surface Pro or Surface Laptop.
"Trade in a qualifying working MacBook, Surface laptop or Windows laptop at a participating Best Buy store, and you'll receive a $160 coupon for a Surface Pro or Surface Laptop and a $40 Best Buy gift card."
If you have an old laptop lying around, this is a good way to pocket some BB gift card credit. Occasionally, BB has similar trade in deals, but there is no guarantee that they will be $75 or $50 again for trade ins. Based on the last $75 deal, BB cut the promotion short by a week.
To help others, post in the Wiki what you traded in (or attempted to) and the date and location.
Disclaimer from site:
Valid in store only. Valid 8/27/17–9/9/17. Coupon redemption valid until 9/16/17. When you trade in a working MacBook, Surface laptop or Windows laptop. Get a minimum $40 Best Buy gift card and a $160 coupon good toward the purchase of a new Surface Pro or Surface Laptop. Excludes Outlet items, special order, clearance, demo and open-box items. Not available in all locations and some stores may have additional limitations. Trade-in value may vary. Condition, documentation and accessories may affect value. 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. Warranty seals must be intact for trade-in. Not compatible with other trade-in offers. You are responsible for removing any data from your product before providing the product for evaluation. You will be required to agree to the Terms and Conditions. Best Buy Trade-In is intended for private, non-commercial use. Limit 1 coupon per transaction. Best Buy reserves the right to refuse any trade-in or limit quantities for any reason. See a Customer Specialist for details..