Hello...I recently upgraded my crop body from a T1i to a 7D and also joined the "full-frame" world with a used 5DII. I did not upgrade any glass...except for getting a used 70-300 IS USM lens as my EF-S 55-250 would not work on the 5DII. I recently took my 5DII to party and shot most of time with my Tamron 28-75 f/2.8. This was a lens I've always been impressed with on my T1i...in fact, every since I got it, it spent most of time on the T1i. I have to say I was less than impressed with it's performance on the 5DII. I had it stopped down to f/5.6 as the vignetting at wider apetures is quite noticable.
I'm now thinking of selling my T1i (with all the original accessories) along with the Tamron 28-75 and the EF-S 55-250 IS, I got at the same time as the camera, just over two years ago. I have the BG-E5 grip, six batteries (four of which are Canon), and hoods for both lenses, as well as a few books on the T1i, that I obviously wouldn't need. Looking at B&H trade-in values and recent posts on Craigslist, I think I could get enough to almost pay for a Canon 24-105. I see alot of them on Craigslist, as it seems quite a few folks get this lens as a kit lens and turn around and sell it.
Any thoughts on if this would be a good move or not?
Thanks very much in advance.