eBay with Eco-worthy has the Eco-Worthy 100W 12V Monocrystalline Solar Panel on sale for $55 - 20% off with coupon code HOTSEASON20 [Exp 8/18] = $44 with free shipping.

• The 200W panel is $96 after coupon. 
• The 6-Pack 100W panels is $240 after coupon ($40 each).