While I was looking for a replacement OBD2 reader, I found this previous front page deal was back again!
E-Tech Distributors via Amazon.com has Kobra OBD2 Bluetooth Auto Diagnostic Scanner/Reader on sale for $12.95 - 32% off by clock the applicable promotions button on the amazon page. (applied at checkout) = $8.81. Shipping is free with Prime or if you spend $25 or more.
Note, item must be sold by E-Tech Distributors and fulfilled by Amazon