Fwiw, I was against Paypal 'til it became the aforementioned "cost of doing business"; since, it makes so many small transactions much quicker than titting about with bank transfers, cheques, etc. - e.g. my bro-in-law gets me something, I Paypal his mobile number, done.
Advantage of Paypal when selling on Fleabay is: buyer wants it, buyer pays, you have money, done. I always send stuff tracked anyway (it's in the post cost), fill in tracking details and I have access to the money.
Never had any trouble with Paypal, helpful staff on the end of an 0800 number when I need 'em, don't have an Inbox full of crap e-mails, etc., etc. Hard to find fault with their customer service model.