I use a B&J monorail 8x10 camera. I've had two of them over the years; the first one had a shorter rail and weighed only about 8 1/2 lbs; this one has a longer rail, looks like it's brand new, and weighs 12 lbs, or about what an average wooden 8x10 camera weighs. Both of mine were gray; I've never seen or heard of a black one. Make sure the camera you have been offered isn't a Calumet C1; they're good cameras but heavy, heavy!!! It has plenty of movements for most people, I would think, and isn't difficult to carry in the field. I screw it to the tripod and carry it over a shoulder with lenses, filmholders, etc. in a bag over the other arm. It isn't my favorite 8x10 camera, to be sure (Wehman!!!) , but it's definitely the least expensive I could find and that's important to a po' boy like me.
I use two lenses: a Red Dot Artar of 16 1/2" focal length in an Ilex #4 shutter, and a Fujinon 210mm (the older one with 352mm coverage.) For several years, until I got the older Fuji lens this spring, I used a newer 210mm Fuji lens which just barely covered the format. I like the perspective of this focal length on 8x10!
It makes a very nice first 8x10 camera if you can get it for the right price. I paid $150 for my first one and a few years ago bought this one on Ebay with a bunch of other stuff; after selling what I didn't want I think the camera came out about free.
Just the luck of the draw but I think that $300 is a fair price for one of these in good shape. Make sure it has the tripod block/clamp! That's the widget which clamps to the monorail and has a tripod screw socket in the other end, so you can attach it to the tripod!
I'll be selling mine, if I ever manage to save enough to buy another Wehman 8x10 camera. Should never have sold the first one: stupid, stupid, stupid!!!
Mike