Is the 3200 the same as the 4200 / GS with integral water and oil pump? If yes, check both functions in any used replacement, as you don't want to solve a water pumping problem, but create an oil pressure problem.
Different Miles, 3200 sits on the front, driven by cam belt.
My advice, don't go for a used water pump. Go new only, it's a false economy.
A used pump might seem ok but invariably, when you fit it with a new cambelt, the extra tension soon finds the weak spot.
If a water pump goes, it will take the cambelt, tensioners, heads, valves and pistons with it. Is it worth the risk....I think not.