There are already many threads here that discuss pro's and con's of the game. For example the "EQ2 or WOW Which is better?" thread here about halfway down this page. Do some searching, you'll find it.
I'll briefly say, if you like L2, stay with it. I don't play it, so I can't speak for it.
EQ2 is fun, but with all new games it's going through it's share of patches and fixes. It is rich in quests and graphical ability.
Selling on Ebay would get only $50-$100 or so. You should install EQ2 and play for yourself. Make a class you like and play for a few days - that should get you to at least level 11, if not higher. Then you will have first hand knowledge and make an informed choice.
It may be the best decision you make.
Good luck!