Best used speakers under $3,500?

I'm starting from scratch in a room that is 21 x 13 x 8, looking to create a system for both music and home theatre, with the music foused on jazz, classical and classic rock.

It's likely I'll spend under $3,500 for the front speakers, and to maximize value, I may buy used speakers from one of the many reputable sellers who list here. (after I chose speakers I'll buy electronics that match well with them)

I'm creating a list of speakers to audition. Already on the list is Von Schweikert VR-4 JR, which can be bought, used, within my likely budget.

What other speakers would you sugget I audition and what are your experiences with those choices?

Thanks