I have a couple BOSS AVA series here, the miniature ones, a 2 channel and a 4 channel and a larger 4 channel mosfet one, they all still working great. They are really old, probably some of them back in the mid-90's? I also have a Pioneer GM-H100 here, probably from way back in the late 80's still works great. Many others too.
I clamped the BOSS AVA-650 the other day at like 400 x 2 bridged @ 1ohm. Only rated for 130 x 4 or 210 x2 bridged.