- ThinkGeek is offering 20% off regular-price orders of $50 or more, 25% off $100 or more, or ThinkGeek coupon: Up to 30% off $150 via coupon code "PUNX". Shipping adds $7.95. (ThinkGeek offers free shipping on orders of $75 or more, but all orders that qualify net a better discount from the coupon.) Some exclusions may apply. This offer is valid till 02/02/2017.