The Fujinon 300C f/8.5 is one of my favorite lenses, bought used on Ebay. It is a telephoto for 4x5, but a normal lens for 5x7 and 8x10. Lens prices for large format have generally dropped in the last few years, with the exception of some of the old arcane lenses from the late 1800's and early 1900's. You used to be able to pick them up for a few bucks at garage sales and flea markets. Since folks like Sally Mann began using them to revive the glass plate collodian process, they are now selling for...believe it nor not.....$5000, upwards to $10,000 on Ebay. I about shit when I saw the prices. These are for old brass lenses without shutters. In the last Sally Mann documentary, you will notice her cover the lens with a piece of cardboard and lift if off for the minutes long exposure, then cover it again, as there is no shutter. Large format camera prices have also gone up, as have other collectables in medium format. I have never seen Rolleiflex prices so outrageous. Even the budget grade Rolleicords are $500 and above, with mediocre Xenar lenses and not Planars.
I will be jumping up to 8x10 in January, when the camera that is being built for me in Poland by Svedosky is done (http://svedovsky.com/). He is a master Polish woodworker who makes 8x10 and larger for reasonsable prices.. American made Deardorff 8x10's that are 50 years old, beat up, with tarnished parts, are commanding 5 grand, which is nuts. This beautiful camera, that looks like Amish furniture and has stellar reviews will cost about two grand and last the rest of my life. While the 5x7 format has been fun, I have discovered I will not find it large enough for the contact prints required to show fine detail with the alternative processes such as Kallitypes, Gum Oil, and Platium/Palladium processes, as I initially thought it would. The other reason for choosing the Svedosky was that it only weighs 13 lbs, substantially lighter than my old 8x10 Kodak Masterview of some years back (which was like carrying a VW). As with the Chamonix, the Svedosky will also come with a 4x5 reducing back so I can shoot the more economical 4x5 films when I choose, especially when traveling. Looking at an image of 8x10 ground glass is like looking at a television set. I read an article in the last few months of a gentleman that spent a number of months in the desert alone, shooting 8x10. If I remember correctly, in three months of shooting, the total number of negatives were only a few dozen. Much more contemplative and decisive. In terms of expense, an 8x10 sheet of film will cost about 50 cents more per sheet than a Polaroid SX-70 exposure using Impossible Project film.