A few people have expressed interest in purchasing my book (signed) direct through me instead of Amazon.

I researched into it, and I am capable of selling items via Paypal, and setting up a page on my website where you can purchase as many copies as you like. I can even add other items such as bookmarks, pens and magnets if, again, enough people are interested. 

What do you think? Should I go for it?

I ask only because, though I can buy copies of my book at a reduced rate, the more I purchase, the less I spend per copy. I don’t want to buy a bunch of books, and end up not selling them.