I get lots of things on eBay and have sold on there, too !
The only problem I have EVER had was ONE time as a seller, someone bought and never paid. It wasn't really a big deal, I just filed it with eBay and relisted the item.
You just have to be safe - I think scammers are banking on you being too nice and sending the item out before realising they didn't pay. :/
I got my sewing machine on there, for "local pickup".
I will buy things like school textbooks on eBay if they are cheaper there, just depends on prices.
I've bought lots of costume parts on there, too. I got some great jump boots for my Clockwork Orange costume off eBay - I just had to hammer a nail back in them and they fit PERFECTLY.
I got a pair of $250 boots for $14. Sold my iPod to someone in Russia, my Doc Martens to someone in Brooklyn.