Floor model and make sure its not a 4 or 5 speed as that will be wood only for the most part. drilling 1/2" holes in steel needs a slow speed adn you can't get there with a 4 or 5 speed unless you go with a VFD on a 3 phase motor or swap in a tread mill motor.
so if it's not 4 or 5 speed it will be single speed ?
No, I don't think I've ever seen a single speed DP.
The most common DPs you see, particularly in the vintage class, generally have a 4 sheave pulley on the motor (2" 3" 4" and 5") and another on the spindle and you move the belt fro one to the other to change speeds on the spindle.
Some few will have 3 or 5 sheave pulleys. Those, 3, 4, adn 5, sheave DP's will be for drilling wood or smaller holes on softer metals like aluminum or brass, copper.
Some will have an intermediate pulley so you have 4, 4, and 4. pulleys, (basically a jack shaft) and you get 16 speeds with that setup, and the ability to gear the spindle and therefor the drill bit way down.
A few DP's, generally the high end DP's, will have a variable speed pulley setup, with a speed lever.
Craftsman for a while had a 8 sheave 3 pulley setup with a real narrow belt and that one can do say 1/2" in steel but isn't slow enough for larger holes in steel. I restored one of those for a freind of mine. decent DP withing it's speed limits.