I think @albertporter could tell you his story better than me-- he had a Walker- a fancy, no holds barred modern (at the time) table and was experimenting with the Lenco (if memory serves). He liked the propulsive aspect of the idler but wanted to get the noise floor down, which led him to experiment with the old SP-10; he developed a rather elaborate plinth using panzerholz and worked on all kinds of isolation tweaks, together with mods done by Krebs.
I have an ancient SP 10 that I bought new back in 1973-4?. It’s not the Mk ii or iii, and doesn’t have the attributes of those tables. I nonetheless had it restored at modest cost for use in a second system. (Though I have not yet mounted an arm).
@ddk (who posts here occasionally) has a veritable museum of high end tables. He could speak better to what he likes about them- recognizing that none of them were bargains, even used, older or in need of restoration.
My main table is relatively modern- though it is now 12 years old. I certainly wouldn’t mind having an EMT from the right era, though.
@syntax knows a lot about the big old Micro-S. Also very desirable, but again, not like you are saving money buying one compared to a new table.