You can install our site as a web app on your iOS device by utilizing the Add to Home Screen feature in Safari. Please see this thread for more details on this.
Note: This feature may not be available in some browsers.
I think yours is a good example that FSD does not add any resale value. Your price is now quite fair, and yet a non FSD 75D with slighly less milage sold last week for slightly more than you are now asking. You should be able to sell very quickly at your current price.