Part of the "Deal of the Day", Amazon has the 2.6W solar panels on sale for $37.49 today.

According to CamelCamelCamel, this is the lowest price by $1.50, so it seems like a good deal!

Edit: Also on sale is the Eufy SoloCam E40 at $99.99, and the eufyCam 2 Pro four-cam kit for $405.99, which is tied for historic low price, according to CamelCamelCamel.