I purchased the 600 f/4 a while back and the 500f/4 is not used any more. I will be putting the money towards a NEW 400 f/2.8. It is complete with all accessories as from Canon plus 2 lens coats (winter) (fall) colors.
It is in excellant condition and only a couple of years new. I send my big guns in every year to Canon for check ups-this one is perfect. Price is $ 5,000.00 and buyer pays shipping/insurance costs to 48 states only. If you are interested in this lense please contact me to discuss payment options.
Sent you an email Bill