The best playing tables of the more common kind would be Riley or BCE, both make steel block or mahogany versions.
The steel block tables have a little more rebound and consistency, but a good solid mahogany rail can play pretty good, that is what I have and it plays great with new rubbers and match cloth. They have been the staple of snooker clubs in the UK for decades. They currently use Star for WPBSA and Wiraka's for the IBSF but very hard to find used.
There are other great tables from the past such as Thurston, Willie Holt, Karnham etc but are not as common, Brunswicks can be okay in a pinch but
Steer clear of Dufferins, Olhausens or Nationals.
When looking at condition, watch for the pocket brasses or plates being loose or splitting where the pins go in the rail and make sure it rolls true across the whole playing area, bowed slate is a pig to replace.