Canon 100-400 4.5-5.6 IS

Does anyone have a decent 100-400L 4.5-5.6 IS lying around they would like to sell? Unfortunately my budget and the misses will only allow me to spend somewhere between 800 and 1000 due to that is what I received from an old duty weapon I sold today. I am not even sure I am in the ball park at that price. I found a couple on Amazon used for 1050.00 but I would rather keep my money in house with you guys and I also kinda got "the look" when I mentioned it. If so can you please let me know as soon as possible since I would like to take it along on my upcoming vacation in June.

Thanks