Franco had a typo...
"If your chimney is in the interior of your house you may not need any lining at all.
He meant to say that if your Chimney is on the exterior of your home you dont have to be as concerned about it being lined (the reason is because any coal gases would route to outdoors anyways).
I personally would just get some of that heavy gauge black pipe and run it right down the chimney and secure it at the top with flange to keep it centered and pop a cap on it, use a peice of dura rock as a blocker at bottom! $100 BOOM done!
But thats me... no profesional is going to say to do that. They will say it will last 2 years (It lasts 5-10 if you cap it good, which is approx. the same time that $2k stainless will last ya burning coal)
Remember... the 100 years our for-fathers burned those baseburners they never had stainless liners