If you want to purchase used - really used, but very well maintained - i understand that right now you can purchase from Lens Rentals. They take good
care of their cameras. However, i always purchase new, just because i want to make sure i am the only one using the item, it hasn't been abused, it isn't
defective, it hasn't been modified from manufacturer's specs. Nevertheless, this is a matter of individual preference and budget. Last, some places like
adorama sell extended warrantees, which protects you beyond the 90 days that seems more typical.