I am considering picking one up from a local shop.

Its got two Tascam cards loaded into it.
Are there adapters to connect TDIF to ADAT?

What would be a good deal on this mixer and are there any issues that would steer me away from this mixer?

I am looking into eventually getting a hard disk recorder. as opposed to my computer for a portable recording rig.

Has anyone ever used one of these? Or know how to make a german mic fit XLR?

I'm a lo-fi nut, I use primarily vintage 2 track reel 2 reels and I use a Tascam porta7 4-trach recorder. I use the best quality tape possible but am in the dark as far as finding a proper microphone for capturing that "vintage" tone.