We have a canon 60mm f2.8 macro sat here doing nothing. Make a fair offer including postage and it's yours.
Actually, there's a sigma f5.6 400mm prime ( manual focus) and a sigma 15-30ex, you can have those for an extra £40 if of any use.
May be a good idea to give an indication as to your budget.
The 70-200 f4 L & 17-40 f4 L are considered to be the best L series lens's for price/quality. The biggest problem with the 17-40 is barrel distortion, but this is minimized on a crop sensor. Both of these can be bought S/H in the region of £300-420, depending on condition (they will also hold their value well too).
The 17-40 will give a field of view similar to a 27-64 on a full frame, and the 70-200, 112-320