I have model 70 mkII's, and I was greatly surprised upon hearing them how natural they sounded, and they look unique with their wraparound grills. There are 4 screws on the back, and when you loosen them the whole back pops off. This could be a design feature that could be patented, I'd guess. They have the standard for Mission inverted configuration (tweeter on bottom), and all in all I was pleasantly surprised. I paid $80 (tax included), which to some might be a bit high. I believe that if a pair of speaks are worthy to sit in my collection they're worth $100 if that's what it costs to bring them home. I buy carefully; I usually hold out for nearly mint items as I'm lousy at diy. I have tackled some grillcloth replacement, but we all know that there's no soldering involved there (hehe)! No destrucion of property, no self-inflicted burn wounds, just be careful not to glue your fingers to the frame, or get it on the components...