I've had it at Apkujung and To Dam Gol, both on Yonge , between FInch and Steeles, but they weren't great, and I think more than $14. You can actually buy fresh ginseng from the Korean supermarkets and make it yourself.
Is this a kind of soup? Like chicken ginseng soup? I believe a lot of korean restaurants have this. Are you looking for a downtown place? Korean Village near Bloor and Christie should have it. I had it at the korean BBQ at Market Village (Markham) I do not remember how much it was though.