As a coach, one thing that used to frustrate me was one player would make a bad decision, and that's all you would read about in the papers all over the country. We have so many athletes do so many wonderful things for other people, and you never read about it.
So many times people are afraid of competition, when it should bring out the best in us. We all have talents and abilities, so why be intimidated by other people's skills?
An agent won't help you get drafted higher, won't make you win more games, and won't make you faster or stronger. They all say they can, but the people who do the drafting don't talk to agents. They talk to coaches, they watch film, they talk to the people who've worked with players. They don't talk to agents.
If you want to get a deal, negotiate with the teams yourself. Say, "I want this much, and no less, but I'll show up to camp on time." It doesn't seem that hard to me.