I didn't want you to think everyone is ignoring you. I know of a New York dealer who has a 5x7 Technica which seems to be in good shape. I think the price was $1,500, though I'm not certain. Contact me if you're interested.
Technika 5x7's are often Tech. IIIs. I bought mine (witha a Tech IV back) locally from a used-Leica-dealer, and paid NOK 5000 (about $650) for it, including a 300mm/f:4.5 Xenar in exellent condition. I would hesitate to pay $1,500 for one, although they often reach this price on ebay.