Experia mini fully working very cheap on o2 but maybe unlocked +

Hi im selling a fully working sony experia mini the digitizer is quite scratched hence the bargain price but when useing the pohone it doesnt effect the picture this is a full android phone and can connect up to your home internet or 3g internet if you have the right package im useing it on 02 at the moment but i think its unlocked looking for 35 ovno thanks