It's kinda hard to buy 'new' rims that are damaged. All you really gotta check for are cracks, dents, and rust.. and cracks would pretty much be an alloy wheel thing. If bottom dollar budget is the name of the game then you'd most likely be after a set of steelies anyhow.. where dents&rust would stand right out.
Theres no shortage of used 15" and 16" 5x4.5 wheels out there.. it's definitely one of the most common bolt patterns.. at least was. Millions upon millions of vehicles were sold with wheels that would fit. To make it even easier, a lot of the vehicles that have that bolt pattern ran tires roughly the same size as the ranger AND had similar backspacing/offset.. so with even a meager amount of luck a guy could probably find himself a set of wheels wrapped in good tires on CL/marketplace for just a few hundred bucks.