Even rough pump plates and contains lead signs have become popular. I like them and they look good on unrestored gas pumps. The prices have gone up on them. I hope some go your way. You may want to consider adding some older rough license plates with the pump plates. They are easier to come by and your joists will fill up faster.
I did see people go crazy over a box of contains lead signs at a local auction. Seems small antique shop owners bid them up until they were over $20 each. I was hoping they would go much cheaper since there were about 25 to 30 of them in one lot. I'll definitely have to add license plates into this project to be able to afford doing it.