What is wrong with the below eBay offering?
Chick on image to see the offering.
If you are new to Chimera African violets or have considerable experience with them the answer is a singular and resounding NO! You cannot propagate more chimera African violets from leaf cuttings. It does not work because it is biologically impossible. On this site are a few explanations from simple to more complex.
I enjoy and use eBay all the time. It is the antithesis of the free market with both benefits and some pitfalls as illustrated here.