Well, not sure what qualifies as vintage but I had a pair of Mirage M7si speakers (made almost 20 years ago), also a pair of M5si prior to that. Some consider the Mirage 'M' series speakers their best effort. These speakers were very well made - quality drivers - X over, good design, and NOT fancy cabinets. Plus the speaker surrounds do NOT rot like Infinity ... other models. They reproduce most types of music well and sound very musical. However they require decent amplifier power. I actually first used an older NAD 7155 receiver and then went to tube amps. I sold my mint pair of M7si's for just $150 a pair to someone local. Sad to see them go as they served me so well. That's a lot of speaker for the money. They are large so shipping is not really an option. You'd need some luck finding a pair local to you.
Good luck
Good luck