Couldn't agree more.. It is natural to humans to be greedy, and when a deal comes that does seem too good to be true, more often than not, the person convinces him/her-self that the risk is worth it.
Me, being new to the game, have been spending hours upon hours of reading / research and I think that is something every collector / investor / hobbyist should do. After all, it is YOUR money, so why not be as educated as possible when risking your own assets?