A fews years ago I bought a used 2000 woodburning insert and just installed it directly into the fireplace. Of course, it didn't draw well, without the liner, so I took it out. I have a couple buddies that have real old woodstoves installed the same way and they say they work good. I hate to spend $1200 on a liner so I was thinking of buying an older model and trying it that way. One guy said the chimney sweep said his chimney looked fine even after burning for 5 years without being cleaned. What are your thoughts? Thanks.