dongguanshilangxiongguidianzishangwuyouxiangongsi via Amazon [amazon.com] has for Prime Members: EcoBasic Ultrasonic Retainer Cleaner Machine for Dentures, Mouth Guards, Braces & Jewelry (Black) on sale for $37.99 - 50% off when you visit the promo code page to activate [amazon.com] (or apply code WLJGRM4A at checkout) = $18.99. Shipping is free.

Note: Amazon promo codes don't always apply seamlessly. If you run into this issue, refresh the page, re-enter the code, or revisit the cart page.