I recently replaced my six Toyo 12R22.5 tires, original equipment, with more Toyos. They had about 44,000 miles on them, and showed very little wear, sidewalls were fine. They were seven years old, so I thought it prudent to replace them.
My take off Toyos were in good enough shape that the tire dealer (Les Schwab in Oakridge, OR) was able to sell them and give me a check for $300. The Toyos were about $1200-1500 less expensive (per 6) than Michelin, and were on as original equipment. I am perfectly happy with them.