$500 · Sigma 70-200 EX APO DG HSM F/2.8 Macro (Canon)
Sigma 70-200 EX APO DG HSM F/2.8 Macro for Canon EF/EFS mount.
Used very little, still in like-new condition. This is the non-OS lens but has a closer minimum focus than the current OS versions.
First $500 takes it.