I would tell you a secret but I am afraid you would hurt my business. Ok, since only a handful of people read this I'll share. EBay is often much cheaper than Amazon. Yet, some people prefer to use Amazon because it seems far more secure. You can take advantage of this. Here is how I do it. I buy Super Nintendo games on EBay then sell them on Amazon.
When I first started doing this I saw a game on Amazon listed for 49.99. On EBay I saw that some complete idiot was selling the game for 9.99. This is not 9.99 in an auction...this is Buy It Now 9.99. With my heart beating out of my chest I committed to buy. What a sucker! I quickly received the game and listed it on Amazon. I was even generous and listed it for 39.99. Somebody would be sure to buy it.
2 months later....Nothing. Turns out some games and books on Amazon will NEVER sell. Found out the seller rank for this game is like 2 million something. And to top it off some goober just put the same game up for sale on Amazon for 15.00. Turns out the "idiot" that listed it for 9.99 got another idiot (me) to buy a worthless game.
So, here is the lesson. I've had the same experience in theology. You know when you just cannot wrap your mind around what some idiot is teaching. He is obviously wrong because your Bible teaches something different. So, you even write a few articles and talk to a few friends about this ridiculous teaching.
A few months later...you wholeheartedly agree with the previous "ridiculous teaching". Turns out he wasn't the idiot you were. Stay humble and always remember you could be wrong. God gives grace to the humble but rejects the proud.