Good lens. I got my first one in a kit with the D7000. Kept it with the D7100. My current walk-around lens on my D7200 is the 16-85mm lens which covers most of my shots quite well, is quite a bit lighter and to my eye is sharper. But the 18-200 is a very good all around lens.
So far, I've had good luck purchasing photo equipment on eBay. Had to return one camera but there was no problem doing so. Look for return provisions in the listing. I really don't want to buy from a seller with less than 99% positive feedback. Be sure to read every word of the listing and look at the pictures carefully. Good luck, my friend!
I really like the first shot, but the solar flares on the second shot are just too good to pass up! Didn't see any other pre/post totality shots, but I personally would try to give them equal brightness. I'll look forward to your post of what you decide.