I think HE60/HEV70 combo sells at $1400 - $2500 USD these days, and the price is still going up.
As for the parts and refurbishment, I was lucky to get help from another fellow Head-fier (thank you, CodeScripted). One can order parts from Sennheiser USA, and can send the combo back for repair and refurbishment.
* headband cushion, around $12.
* ear pads, around $60.
* cable, around $102.
The labor at Senn USA is $100/h. I can tell you guys the cost on labors once mine is refurbished.
Hope these information helps.
just ordered a couple pairs of ear pads and a headband unit. I'm pleasantly surpirsed that Senn still has them in stock.