It's got $100 of iron in it,thst's wht it's worth. Well, if the pump is good, you could go $150, but bet it needs a rebuild, $100 or less would be better. I got an old beater like that (slightly different, but about the same) for $300, and all the parts listed below were there and it was working for a reference....
You'll need some bigger hose between the pump and the tank, x2.
You'll need a 'pressure regulator/ on-off/ up to 3 diff lines controller' in one side of the hose - simple manual one should be fine.
You'll need some smaller hose from the regulator to the booms, with lots of pipe clamps and the plastic Tee noozle holders. Oh, and clamps to hold the holders to the bar you have.
You'll need the nozzles and strainers that fit into the Tee holders.
Pretty much it.
All of that is available in bulk from any TSC, Fleet & Farm, etc; or any good real farm dealership of any color. You can mail order it all from several sprayer specialty mail order places as well.
Won't really matter what brand it is, tho I'm sure you'd like to know anyhow.
As others say, you'll get a bit less results than you might think, but if you get higher output nozzles than most spray folks would want & drive slow, I guess you could get a little dust control to be worthwhile.