DreDaze wrote in post #15139812
if you buy used you won't lose much money if any on EF-S really either..if you wait around for deals you can also make money...if you buy new, sell used, you're going to lose money regardless if it's EF-S, EF, or L....
I couldn't agree more. I buy used cars for the same reason. Let someone else eat the 40% depreciation in the first two years. I bought a bunch of stuff when I first moved to Canon 4 years ago. I though EF-s stuff would be good enough.
That lasted until I got my 200mm f/2.8L (used). I horse-traded a lot when I was getting started. New EF-s glass cost me about 50% of the purchase price when I moved on. I bought several used EF units on EB/CL and played with them, then unloaded them. All of this helped me decide what I really wanted/needed. I used the 200L and 135L for over a year, and made enough to cover the shipping when I sold. Total cost of ownership: $0. I bought a few lower end EF-s units and that, effectively, cost me a bundle. Bought 18-135 for $449, sold for $225. Cost of ownership: $224. That was a waste of money.
This summer I picked up a Σ 70-200 2.8 OS for $750. That lens will be worth that much as long as it works. Two items I bought new recently, because I know I am keeping them, were the 100-400L and the 15-85. I knew what I wanted, I thought it was worth paying new price for a factory warranty. I am happy with that.
To the OP. It is completely irrelevant what your 17-55 is worth to you. Your choice, as stated above, is: sell for the going rate or keep it. Well, you could donate it. That may earn you a tax deduction for its full initial value. If you are a business, you could give it away in a customer drawing. Or donate it to a public school art department.