PayPal cuts $5 off Home Depot in-store purchases of $50 or more when you pay in-store via PayPal. (You must add the desired coupon to your PayPal account via the above links.) Plus, PayPal will donate $5 to Habitat for Humanity. That's the best such dollar-off / charity donation offer we've seen from PayPal for Home Depot purchases. (We saw $5 off $50 with no donation last week.) You can pay via PayPal in retail stores using either a cell phone number and PIN that you set up after adding the coupon to your account at the link above or a PayPal payment card that can be mailed to you at your address. Deal ends April 21.