Help selecting Pioneer Elite used receiver

I am looking for used decent surround receiver under $400 (CAD). Following items available used craigslist Canada. Is there a way to understand how the Pioneer Elite VSX series are named based on high-end or low-end? Would any one of experts be able to help pick out any one or two AV receivers from the list below that is outstanding and awesome from this list below?

VSX-94TXH - $375 (CAD)

VSX-01TXH - $300 (CAD)

VSX-09TX - $250 (CAD)

 VSX-80TXV - $250 (CAD)

VSX-56TXI - $250 (CAD)

VSX-07TX - $175 (CAD)

VSX-52TX - $120 (CAD)

VSX-51 (year 1991 model) - $110 (CAD)

Thanks in advance for your advise.