Canon FD lens recommendations

[burstintoflame81]

Can anyone recommend a decent FD lens for me to keep my eye out on ebay for? I am mainly getting it to use to reverse for macro. So I would prefer something a little long around the 100mm mark or higher. I am also getting an adapter though, so if there is a sort of revered lens that is a good value, I would like to get it so I can tinker with it as a normal manual focus lens as well. Thanks in advance.