AT you heels are free on the up and lock on the down allowing you to make typical alpine turns. Telemark the heel is free and you drop a knee to turn.
In the past I've had good look scouring craigslist, OGE, other forums, and bargain basements. I'd search for the right binding on a junky ski buy that and then put it on another ski that better suited me.
Roger is a kook and spends too much time stroking his ego.
Personally, I'd stay away from any EMS not located in a mountain town for mountings, but they do have good ski deals from time to time. Likewise, I'd stear clear of REI for mountings, but again from time to time deals can be great.
OGE in burlington has a good selection of used boots and from time to time skis. They tend to be on the heavier resort style ski. They have a pretty strong new ski department, and some of their blemish sales are as cheap as they come.
Allspeed cycles in portland is also pretty good. I believe the owners name is Chris.
Used to be another good spot outside of Mt Abram in ME. Guy was a little weird but he had a wonderful selection.
Stowe has a spot on the mtn rd that if I remember correctly has demo skis for sale.
There is also a place in Farmington that once had a good selection, but I think they've changed and now tend to be on the expensive side.
Bath had a shop on rt 1 heading toward Wiscasset that I believe had a few used pieces of gear. I used them once for a mount and they messed it up but it was cheap and easily corrected.