Not all 10 lug patterns are the same. As has been said, there are basically two different patterns to look for, "Stud Pilot" centers or "pilots" the wheel on the studs, and "Hub Pilot" that pilots or centers the wheel on the hub (axle).
Back in the day the "Budd" style wheels are stud pilot with a tapered nut (inner nut for inside dual, outer nut for outer wheel of a dual), and the newer (some 1980s and up) use locating flats on the hub for both the inner and outer wheel (of a dual) and the "nut" with attached swiveling washer only "clamps" the wheels to the hub, but not center them.
If you are not sure, post a picture.
The stud pilot are usually 3/4-16" inner and 1-1/8" outer, and the hub pilot are metric 22mm stud threads
Steel/alum-many folks will run aluminun on the outside for looks and steel on the inside to save money.
$200 each is CHEAP for new wheels, but pretty steep for used wheels. In our area, used aluminum wheels sell for $125-150, and new from about $275 and up
Generally the stud pilot will have a 13/16" square drive inner and 1-1/2" hex out and the stud pilot usually have a 33mm hex, although there are some odd ones.