Macro to find duplicate values

I have 2 columns of data. Column 1 has unique values but column 2 has some duplicates of values in column 1. There are about 3000 values in the columns.

I would make active a cell in column 1 then run the macro to find and goto the duplicate value in column 2. Then run again to find if it is duplicated again etc.

Is this possible?

I have attached a sample file.

Thanks
Liz