Dream job or mistake?

Sure I'm going back into my old ways but it's right up my alley. I called this guy named James and he's a photographer. He ran an ad in the paper asking for amateur models to be a part of his new calender. He is paying me $200.00. I made an appointment to meet with him later on today so I'll let you know how it goes! Why do I think that this could possibly be a mistake? I don't want to get into anything sketchy, not that I'm not familiar with it already. Well, I'm excited to give it a try. I need the money so, hey, why not?