I've listed my Audio Control SA-3050A for sale on eBay. It's very lightly used. It's very clean. Check out my listing @eBay - http://rover.ebay.com/rover/1/711-53...g&toolid=11111
The analyzer has the parallel printer port and the battery options. Calibrated mic is included. These are still used at meets, aren't they?
Oops! Here's the correct link. https://www.ebay.com/itm/AUDIO-CONTR...R/302963865650