If you need a replacement on a budget, these are your best bets:
Tires over six years old can be dangerous, even if the tread looks new. where do they buy used tires
Chains like Mavis or Pep Boys sometimes carry used inventory at select locations. If you need a replacement on a budget,
Got a set gathering dust? Here is how to turn them into cash: where do they buy used tires
They buy "casings" (tires with worn tread but solid frames) to refurbish them.