I'm in a fairly expensive metro area and 10-year-old Priuses are about $3500. Not hard to find, and if a good mechanic does a pre purchase inspection and doesn't find anything major wrong - they are extremely reliable cars even now. Plan to spend another $500 on tires, as with any used car. The only thing most shops can't easily check is the HV battery cells; even if that goes out, again, there are shops that will replace the battery pack for under $1000.