What do you guys think about some of these serums for use with dermarolling?
http://www.ebay.co.uk/itm/Microneed...h_Beauty_Skincare_PP&var=&hash=item3f2a6c207e
http://www.ebay.co.uk/itm/Microneed...h_Beauty_Skincare_PP&var=&hash=item3f2a6c207e