JD 8420 Tractors (made 2002 - 2005) are selling at auction for nearly what dealers asking for them on the lot. Avg. Auction Price this year $65,440. Avg. Auction Price 3 years ago $65,885. Current Avg. Dealer Advertised Price $71,556. Here's link to (37) 8420's for sale today: www.machinerypete.com/listings/tractors/175-hp/john-deere/8420?custom_search=&dynamic_site_fields%5B17%5D=&dynamic_site_fields%5B6%5D%5Bmax%5D=&dynamic_site_fields%5B6%5D%5Bmin%5D=&hours%5Bmax%5D=&hours%5Bmin%5D=&limit=72&manual_sort=true&old_location_str=62691&price%5Bmax%5D=&price%5Bmin%5D=&sort_term=most_photos&year%5Bmax%5D=&year%5Bmin%5D=&zip_code=62691&zip_miles=100000