No. For £70, you could get an LG Viewty Snap which is great value for the money. Besides, 2nd hand can be frauded or refurbished or stolen. My advice is go to T-Mobile or O2 or Orange etc and get a LG Viewty Snap.
http://www.nokia.com.au/find-products/all-phones/nokia-n97-mini/specifications
its an excellent phone, but its a huge risk buying second hand, i wouldnt do it.