Matthews 777 Guarantee At Matthews Auto, we don't want you to feel like buying a used vehicle is a gamble. That's why we created the Matthews 777 Guarantee. 7-Day Exchange- If you don't love your vehicle, you can return your vehicle within 7 days for free. 7-Month 7,000-Mile Warranty- We've got you covered with Free NYS Inspections, Tire Rotations & More. Plus, get a free car wash with every service visit. Matthews 777 Guarantee. Just another that Matthews Means More. Every Day. Every Way. Price excludes registration and title fees and taxes. See Dealer for Details.