Hi: I have for sale the Sony Optical Viewfinder for the RX-1. It is mint, only used a couple of times, I'd call it As-New. Included are the box and instruction sheet. Only $370 + shipping. I'll post photos tomorrow. Have both sold here and on E-bay for 10 years, with a perfect 100% rating. (e-Bay Seller name "viswan"). Oh, the part number is FDA-V1K. -Josef