Some people will send you something with just a SAE, others won't, but if you send a SASE (or IRC's or money) you have a way better chance of getting a response back... So this is your choice, you can send whatever you want, but I think SASE/IRC/Money is a better choice. :)

I have been collecting autographs since years but only through email so I need help.
I have always to send an International Reply Coupon or money?

Or I can send only the SAE and my photos? Please help me!