Tdbest via Amazon offers its Tdbest Car Ionizer Air Purifier in Black or Pink Gold for $39.99. Coupon code "86D8SGIF" cuts that price to $27.99. With free shipping, that's $12 off and the lowest price we could find. It claims to remove allergies, smoke, mold, dust and germs from cars or other small spaces. Deal ends June 19.