Great Hudson model to be had for decent prices now (I got mine for $480 with the display case).
This piece is pretty consistent in running quality. I think the only issue that came up was with the sliding valve mechanism jamming up, but it's relatively easy to fix. I've encountered many, and haven't seen one of these come up, at least not in swap meets.
If you want a conventional engine with adequate enough sounds and an important part of Lionel's history, I say go for it.
