Almost anything McIntosh is a good value on the secondary market provided you purchase from a reputable establishment that will support your purchase over the long term. You'll probably pay more initially but you really can explore your heart's desire and be satisfied with any McIntosh product new or used.
I've owned an MR77 tuner used, and new MA5300 integrated, MAC7200, as with all McIntosh tuners among the best ever made and the built in phono stage is outstanding. I still have for keeps my MCT80 transport and MDA200 DAC. All good!

