Hey Jsman,
Sorry for the late response...just got back into town. I purchased my A820, with 1/2" and 1/4" capabilities, from a mastering studio in Burbank. Had both headstacks evaluated by Sprague Magnetics in Sylmar, CA...95% head life remaining...Charlie Bolois sorted the deck for me. I think I paid approximately $5700, total.
Regards,
Sam