Vintage Briggs Engine- 4hp

Hi All, I have this engine- kind of runs on starting fluid- so maybe needs some carb work. What is it- and what is it worth? Model is 11232 and looks like it was built in 1978?

I live in chicago IL- if anyone wants to make me an offer (I'd rather not ship it). However, I also am restoring a bunch of mini bikes (which all used Tecumseh engines) - so maybe I should keep it?

I can move this to the For Sale section- once someone tells me what it is worth. Thx, Paul