Teach me about Shipping Parts!!!

Hey guys I haven't had a whole lotta luck selling my parts locally and have had a few people ask if I'd ship parts. I've been reluctant to do that because of the horror stories I've heard where people either don't recive the parts or the money because of it got lost in the mail or people (sellers and bidders alike) try to rip people off by not sending the parts or the money. I also was reluctant because I have no Idea how to go about shipping anything, I've never done it before.

So if anyone with experience shipping parts or sending money for parts could help me learn the right way to do it I greatly appreciate it!

Thanks

Grant