Mods, if this is not the appropriate section please inform me where to move or post it.

I have an antique set of 9 blacksmith chisels I am looking to place a guideline value on. (photo below)

History would take it back to my great grandfather (possibly my great great) and passed down from there so they are a few years old.

I scratched them out yesterday from between tools in my folks garage, I now would like to clean them to be more presentable on the eye for a potential sale to a hand tool enthusiast or antiques collector I still need to find for my mom and who would appreciate their age and for what they are.

Someone was looking to buy them for a figure of max R1500 from her but my gut feel puts them further up the ladder in value.
The sentimental value is making me ponder on a few thoughts for myself.
The tools were last used many years ago by my grandfather in his youth.

I found the following visible stamp on one, the others may be visible when cleaned of dust, rust and debris.
Easterbrook
Allcard &co LT
Sheffield

Any thoughts from those in the know?

https://i.imgur.com/dKbbTHW.jpg