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OFISPEED-US via Amazon [amazon.com] has 6″/7″ OFISPEED 1600W Rotary Car Buffer Polisher Set (Blue)on sale for $56.99 – 42% off when you apply promo code PS8SYTVS at checkout = $33.05. Shipping is free w/ Prime or on orders $35+.

Note: Amazon promo codes don’t always apply seamlessly. If you run into this issue, try refreshing the page, re-entering the code, or checking after you select a payment method to confirm whether it already applied.