Sorry, but Amazon is NOT always correct about fitment. You will need an eye to clevis shock for 1979-82 CB650 models. The ones pictured are eye to eye. MORE IMPORTANTLY, they don't come with springs. I'm sure you'd rather have pre-assembled shocks.
Also, DO NOT buy cheap Chinese crap, even IF it has a reservoir. If you buy cheap shocks, you will get a cheap, crappy ride. If you are set on Progressive BRAND shocks, call them and get the correct 12 series model for fitment for your bike. You should also look into Hagons, IKONS, or if you want quality reservoir shocks WORKS or RACE TECH.