I am a long time published professional, and both lens are in excellent condition. The 400 L 5.6 comes with a case, and was purchased in 2014 and used very little. The 300 L 4.0 I have had multiple magazine cover images taken with this lens. Both are in excellent condition and are really tack sharp. $1,000 each (Firm) plus UPS shipping.
400 L 5.6, top, 300 L IS 4.0, bottom.
$1,000 each, plus UPS shipping.