Everyone says to hold out on buying textbooks until you're sure you need them but what about iclickers? If my textbook list says I need them, should I wait like with textbooks or is it safe for me to get one now?

Yup, same thing. Although since you are in sciences, you will very likely be needing them.

You can buy them anytime, but wait til your prof actually says you need one.

Can be bought at mac campus store. (Itl be packed!)

Thanks for the help.

I can sell you mine

tip: you probably don't want to sell it after first year if you're planning on taking first year electives later. Most first year classes I was in required an iclicker. As the years go on they're used less often so you might get away with selling it and maybe re-buying one later, but there's no harm in holding on to it just in case because they'll still be in use (and therefore in demand) for a loooong time.