Thumb Score: +40 BestBuy.com has Dynex 3.9' 4K Ultra HD HDMI Cable (Black, DX-SF108) on sale for $1.99. Select in-store pick up where available or get free shipping on $35 or more. Thanks longmanj9 Best Buy via eBay also has Dynex 3.9' 4K Ultra HD HDMI Cable (Black, DX-SF108) on salefor $1.99.