I'm not into the Mystic's appearance, but that's me. The /5 is definitely of an age where it's hit the bottom (monetarily speaking) and coming back up.
The Mystic may never drop any lower in price considering it's the last of the airheads and one of the most rideable.
So if you're looking at this from an investment viewpoint - looks like a toss up to me. Ride them both and see which one jerks your chain.
Wanted: Dead, smashed, crashed or trashed gauges
BMW GAUGE REPAIRS - TACH*SPEEDO*CLOCK*VOLT METER *PODs & LIGHT BOARD*