My local shop has juice from Cali in plastic pails with some sort of valve
built into the lid.

He has a 23 litre of cabernet sauvignon, and a 20 litre burgundy.

He said that he pulled them out of a cooler for a customer who never picked
them up, so he added yeast to them (this was about a week ago) and that all
I need to do is take it home and put it in a carboy.

Does this sound like a bad idea? Should I try and get some fresh juice that
has not had yeast added yet or would this make a decent wine?

I realize I'm asking lots without giving much information, I'd just like to
know what you folks think.

Thanks in advance.