The 1896 Morgan would be XF but it's been cleaned and probably dug up from the ground. Essentially it's worthless.
The 1878 on the other hand is a great coin, and I would guess should grade XF for sure. It would be AU except for the wear on the front hair and some of the very fine points of the Eagle. That is a nice example, hoping it wasn't cleaned of course.
The Walker looks incredible and should grade an AU at the lowest. Might be an MS but it can be hard to tell from pictures. I believe that seller takes all his Walker pictures like that, with a black background. He/she sells some great looking coins. Don't think I ever bought any from them though. I'm focusing on collecting AU or better Walkers
Oh, and you might wanna find a coin you like and start collecting only that kinda coin, otherwise you end up with a ton of different coins and no focused collection if you know what I mean. Some people just love all coins and wanna collect everything, and that is ok too.
Great places to look for coins are antique shops, flea markets and estate sales. Ebay is ok if you know what to look for, but you'll almost always pay for them. Getting a bargain is like hitting the lottery on there. Everyone is looking for a bargain, and they all know what to look for.