Yea, either of those stores are reputable. For
Keh take their rating and consider it a level lower or even two of what the lens actually is. They look at them very close to make their ratings. And will mark them down for stuff you don't see.
The least expensive lenses with be AF and AF-d lenses (of all the AF lenses). These are the ones that need body AF drive to focus. For future use D50, 70, 80, 90, 100, 200, 300, 500, and 7xxx series has the focus motor in the camera for crop sensor bodies (DX). All FX or full frame dslr have it as well. So, these lenses will work in those cameras if / when you move to DSLR.
AF-I has motor in the lens. Majority of DSLR's can use them, and the 8008 can as well. AF-S has more modern motor in the lens and same for operations as AF-I.
AF-S G lenses do not have aperture ring. And you will not be able to use aperture priority on the 8008. So, I would stay away from these until you go DSLR, when they can use them just fine.
Any lens that says DX will vignette on the 8008. They are made for crop sensor DSLR's.