I don't know about your photographic style and need, but how about the following option: 1. Buy the used but mint 35-70 f/2.8 2. Buy used but mint 24mm f/2.8 or 20mm f/2.8, whichever focal length most suited to your preference. 3. If it happen that you really need the 28-70 f/2.8, you can resell (1) and (2) at slight loss. You can wait to buy the 28-70mm f/2.8, but there's potential problems in going this path: 4. You loose some wonderful opportunities while waiting for it. 5. There is no used 28-70mm f/2.8, so you have to buy a new 28-70mm f/2.8 lens. 6. If it happens that the 28-70mm f/2.8 is not what you really want (for whatever reason), you will have to re-sell it at greater loss than reselling (1) and (2). I have to admit one possible problem in option (1) and (2): When the 28-70mm f/2.8 appears, you want the 28-70mm f/2.8 but don't want to let your (1) and (2) go !!! :( Just remember, only you knows your need. Others' opinion (including mine) is just trying to help you exploring options that might be forgotten/overlooked. Warmest Regards, Januar Rahadi. Bandung, Indonesia.
