2x iphone 3gs 16gb in working order but selling as spares or repairs +

hi i have 2 iPhone 3gs 16gb on o2 1 white iPhone is in fully working order but has a little chip at the top of the screen and the signal keeps going off but comes back on after a minute and the other iPhone is in working order with a brand new screen and lcd but the signal goes off then comes back on after a minute. this phone also turn off randomly but has had a new battery so im selling both iPhone as spares or repairs 160 ono for the both. some one who is good at fixing them could fix these selling as i want a new phone i will add pictures some time tomorrow