The 2105 amp, which came out in the 60s, carries 105 watts and in good conditon fetches upwards of $1000. The C28 preamp dates from 60s or 70s and can also cost that much. It had both high- and low-level inputs (for mics, of all things) and an array of switched and unswitched AC outlets. I think that the MR78 tuner is from the mid-70s, and it's still highly regarded. I have no idea about the equalizer. Much of this vintage McIntosh equipment is still in demand.