Staples has a special in-store price of $117.10 for the Logitech Slim Combo for iPad Pro 12.9:
The online price is $149.99, but I was able to buy one in-store earlier today for $117.10.
This is YMMV because inventory is low, all stores in my area only had one. Use Brickseek or Staples.com to find a location near you that has them in stock. Call ahead to confirm the in-store price by giving them Item # 2750949. If they don't have it in-store you might find an employee that is nice enough to put in an online order and match the price.
Make it slightly more sweet by using Discover cashback to buy a gift card, $25 cashback gets you $30 so approx 16% discount on top of the already low price. Maybe others know of other non-Discover ways to sweeten this deal.
Also check Staples clearance sections. My store had some nice first aid kits for 50-70% off.