I bought the camera used from ebay from a good seller... the lenses were from my d50 about 3 years ago... my 18-55 seems that the focus ring lock broke- as the ring is very loose and comes in and out even in AF mode... my 55-200 is making funny noises, sometimes it'll focus and sometimes it won't... I hear it working too hard. 2 different problems, but within a day of each other- just really bad luck?