APPLE IPHONE 3GS O2 VERY GOOD CONDITION PARTS ONLY BUT WORKING ?

THIS PHONE IS IN VERY GOOD CONDITION FRONT AND BACK COVERS ARE VERY CLEAN & CLEAR NO CRACK ANYWHERE.NO VISIBLE DINT or SCRATCHES i bought it off eBay,it still functions, can make calls and text with a sim card inserted. Can access Internet with valid 3G sim or wifi connected. There is no backlight so needs to be held up to the light.. Centre button sticks. Would be ok if repaired or used for parts please note down that i dont know the history of the phone only phone on other accessories no silly offers,no withheld number (wont be answered)