I would buy a Tachihara 8x10 & then pick up a 4x5 & 5x7 reduction back... If they don't offer a 5x7 reduction back for the Tachihara, then you'd do well to pick one up off of THAT auction site & retrofit it to the 8x10.
Why do I say this? Well- the 5x7 isn't that much smaller, lighter, or easier to setup/handle than the 8x10. I have 2 Tachihara's, the 4x5 & the 8x10, as well as the 4x5 reduction back for the 8x10. The only reason I take out the 4x5 instead of the 8x10 is if I'm going on a hike & want the lightest camera I can find. I'm in the process of retrofitting a 5x7 back for the 8x10 & then will have all 3 of my favorite formats!
Good luck on your search...
John (Alpha Flying Monkey) Moore
For under $600, you would have a nice 5x7 with a 4x5 reducing back. You can find a 5x7 back which fits this camera or for a a couple hundred more or so you can purchase a new deardorff 5x7 back Seth also has.
Quite honestly, I still might purchase it....it is a daily struggle to decide, for it has both front and rear swing and suffficient bellows length.
If I did not already have a 4x5 tachihara with a 5x7 extension, a 5x7 Korona and 2 8x10 Deardorffs.....I would purchase this Deardorff knock off in a heart beat or a New York Minute for those on the east coast....
I truly would love to see more film options for 5x7....I just took out some old 5x7 color chrome film this weekend and hope to shoot is very soon..
Whatever you decide, we all need to promote FILM! My best to one and all, Jon