My very first box was the first Mosaic - the Blue Note recordings. I was a jazz newbie and I read an ad in Downbeat. The UPS guy delivered it on Christmas Eve, 1985 or 1986. Amazing business, amazing run.
Early on, I played the hell out of Tina Brooks, Larry Young, Andrew Hill, Woody Shaw, Jackie McLean and Art Blakey. That material was just unavailable, at least in the midwest. Adored those boxes, still do.