Thumb Score: +35 Best Buy [bestbuy.com] has 50″ Insignia F50 Series LED 4K UHD 60Hz Smart Fire TV on sale for $149.99. Shipping is free for My Best Buy members (free to join [bestbuy.com]). Otherwise, select free store pickup where available. Best Buy via Amazon [amazon.com] has 50″ Insignia Class F50 Series LED 4K UHD…