I doubt that the version I will be around $1000 used, I think it will be around $1400 to $1500 if the version II is $2000. The reason I say this is because the f/2.8 non-IS and the f/4 IS are sold around $1000-1150. If I were looking for a 70-200 and only had $1000, I would definitely look at a70-200 f/2.8L IS I used, because it is $1000, f/2.8 and has IS. This will kill the sale of the f/2.8 non-IS and f/4 IS, considered how many people own the f/2.8 IS I and will try to upgrade. Not sure if I make sense...what do you think?