Thumb Score: +16 Woot! [woot.com] has 2-Pk Plantronics Poly Studio P5 Professional HD Webcam for $19.99. Shipping is free for Amazon Prime Members (must login with your Amazon account and select a shipping address in order for Woot to apply free shipping) or is otherwise $6 per order. Deal history:[list][*]Frontpage Deal at $20 with 42…