I’m guessing you don’t buy and sell many pumps then. The ones that bring the money are nice originals with good patina. Patina doesn’t necessarily mean “rust”. I stopped restoring pumps years ago because the hobby was shifting much more to original pumps (as was I). But to each their own.
I find pumps in that shape are tougher to sell than originals. A nice patina Wayne 70 is worth in the $1500 range. I’d price the one pictured less than that, even though it’s obvious someone put some time and money in to it. JM2C.