You may want to give Audiogon and Videogon a try. I haven’t bought from there, but many others have with great results. They are on-line second hand bulletin boards.
A note on speaker connectors…..The banana’s are the way to go on the receiver end. Especially with the upgratis bug that you are most assuredly going to get, especially if you hang around here much. I’ve literally spent thousands of dollars I’d have never thought to spend if it weren’t for hanging out here……
But for connecting the wires at the speakers, I’d go with spade connectors. Yes, they are tight to get to, but there’s only two. And Axiom sends you cute little plastic wrenches that I just leave hanging on the binding post. The real reason I say spades, is 1) bare wire into the posts is sorta goofy. The cap puts twisting pressure on the wire and actually bends and cuts it. Several on / offs and you have to re-strip the wire. Not a big deal, but just not right either. 2) the posts are at an upward angle. When you use banana’s, the wires are forced up into the air. With the spade connectors, the wires lay naturally on the floor. Are these big deals worth worrying about??? NO! But, they bothered me every time I looked at the damn things until I finally ordered pre made cables from Axiom.