I bought mine used from the GFS here years ago and it's great. Strong as an ox. Has super flexible io. I use Powered tops so I use the on board power for two monitor mixes. I run from the aux 1&2 out to an external EQ and from the EQ left & right out back to power amp in A & B. works great.
I got a case off eBay for about $100 which has kept it clean and sfe over the years.
One thing you do not do is try to run it at less than a 4 ohm load. I haven't experienced this but I hear tell that they will smoke. Given they are rated at 4 ohms, it would be kinda silly to try 2 ohms anyway is my thinking.
Best mixer in it's class by far iMO.
Stuff I find helpful
2 effects sends and 2 aux mixes per channel. Sweepable mid frequency, long faders, great I/O routing options. Mono out with variable lpf for quick & dirty sub woofer use. Overall, very clean and clear sounding.
Stuff I wish it had - there isn't any room for it but EQ's for the aux mixes would be stellar. Maybe if they went digital and let the main grqphic be the UI for all three mixes. But that would be a mich later generation, more expensive board. For the dough, it's a killer board.