I have a Solar Technology Silent Sentinel Solar Arrow Board for sale.
I acquired the unit in an inoperable state and was going to convert it into a welding trailer but figured I would see if there were any interest in the unit whole, or if someone needs some parts off it. Everything looks to be in reasonable shape, I think the batteries may just be dead. If I get some time, I will try and troubleshoot it some.
If the add is up, the board is still available.
Trailer is tow worthy, just had it on the road. Located in 20620 MD and can load this on your trailer or truck if need be.