History Help with value of old vintage Moon fuel pump and fuel gauge please?

I have had these hanging on the wall for about 40 years and trying to clear out some stuff. Any thoughts on value would be appreciated.
The gauge has had blue rtv over the holes in the back and I have had electrical tape over the light slot to keep dust out. It worked fine last time I hooked it up to check and that was probably 15 years ago.
The fuel pump functions but I would think it needs a new seal. The on/off valve on the pump moves freely and works fine.

 

That's some cool stuff there.. Sorry, don't know the value of the pump and cutoff valve....

 

Put each on that big auction site with a $500 reserve and see where the bidding stops. That should let you know.

 

Thanks, thought about Ebay but I usually don't care much for selling there.