In a quandary sums me up at the moment. I want (need) to update my camera lens from the Sigma 170 - 500 to a Canon 400 prime or Canon 100 - 400. So, what do I do? Budget is paramount and unfortunately not very big!
Buy new and have the safety net of a warranty should anything go wrong?
Buy second hand at the risk of "buyer beware"?
Use a local reputable dealer at a higher price or use a distant dealer at a lower price?
Risk a bid or buy on e-bay?
Try to part exchange my existing lens or sell privately?
Go for a Canon 400 prime which is cheaper? I nearly always use my Sigma at 500mm.
Go for a Canon 100 - 400 which may be more versatile, but more expensive?
I am not very good at making decisions and will probably make the wrong one! Hopefully I will make the right choice (probably when all of the bargains have been sold!). Eventually.......................