Be aware that some of the auction houses charge a 30% fee to the owner of the items to sell the items. Some auction houses charge from 10-20%.
Thanx for sharing more pics! That is quite the collection and most looks to be originals and in great condition. Some pieces similar to yours go for thousands of dollars each especially when it's a original porcelain neon sign like the Mobil. They are all highly desired and I know that personally, I've had those three Phillips signs on my list for a long time but know I can't afford them in anywhere close to that condition!
I'm also guessing that he had quite the car collection in there below those signs and if you have a auction house handling those, you might ask them if they do "road art" or advertising auctions too.
If your husband recently passed, my condolences to you and your family, and if this is all leftover from a divorce, congrats!!,,, haha
Again, Good Luck!