These guys (theurbanpython) are like a canadian ralph davis. I wouldn't hesitate to buy hets from them, even these toffee hets if I had the $$..
here is the guarantee:
Although we and many others have no doubt that the trait is inheritable, we can appreciate the potential anxiety that can accompany an opportunity that commands this level of investment. Therefore each and every Toffee offspring will be sold with a written agreement guaranteeing the genetics of this project. In other words your investment is 100% protected against the project not proving out. The long and short of it is we have no doubt that the Toffee Ball is a simple recessive mutation and we will stand behind that with a full money back guarantee.