I have a Sinar Hy6 system for sale (no digital back). USA only (free shipping). All items are available for local pickup in Southern California.
Sinar Hy6 body (essentially new in box) with waist level finder, grip/strap, battery, charger, etc. - 3500 USD
used, mint Schneider Apo Tele-Xenar PQ 300/4 APO lens (manual focus) - 2500 USD
used, mint 17 mm extension tube (with full electric contacts; works with Hy6) - 200 USD
1.4x Longar extender (NIB) - $750
used, mint Schneider AFD Super-Angulon PQS 50/2.8 (autofocus) and rubber hood (no box) - $2500
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SOLD:
Schneider Apo Symmar macro PQS 90/4 (manual focus) with box