Columns for ssDNA oligo purification - (Mar/28/2012 )

Just wondering what brand of spin columns other labs are using for purification of ssDNA after end labelling?

We currently use GE Healthcare's Illustra Microspin G-25 columns for recovery of a 39-mer probe after labelling with isotope, but were wondering if there are any cheaper/better options out there?

Thanks.

We used Quick Spin colums from Roche, but I would doubt that they're cheaper.

You can make your own with Sephadex G-25 and an empty filter column. Biorad makes empty columns.