I once bought a Burke & James 4x5 camera on eBay. The description said nothing about a lens but the photos showed a hint of what appeared to be a large lens. The photos and description were both bad so it sold for a bargain $65. The camera did indeed have a lens, a 240 mm Caltar (Symmar S) f/5.6 in a Copal 3 shutter. It had a thick layer of second hand smoke and dust on it but it cleaned up just fine. There are a number of minor coating marks but they don't seem to affect anything. It's a perfect portrait focal length on 4x5 and covers 8x10 with limited movements by f/22. I have to chalk up my good fortune to a bit of a gamble but it is a lens that cost me less than $100.