Has to be the 135L, followed closely be the 100L macro.
I purchased a used 5DII in the past year. My considerations were (1) is it at or below below market price (2) excellent condition (3) low actuations (4) 100% positive feedback on Ebay. Nice to haves were original packaging and receipt. I would not have had an issue purchasing a refurb body if the considerations were met. I have purchase refub lenses and P&S and have had no issues at all.
Did the 5Dii have a pin hole in the serial number plate on the bottom of the camera? Just curious, it sounds like this is something new by Canon and if so, wondering why they decided to do it?
Keeping the original receipt is a good idea, I will be sure to keep it if I decide to keep the camera.
Thanks for the tip!!