FYI I only accept Non-paypal payment and its quite strange because everyone tells me that I have to take paypal, but when I compare my item listings to those of others, I get the same amount of money or more for my stuff, even though I don't take paypal. I do have good feedback though, 291 positives so perhaps that helps things out.
Seriously though, I don't think I could sell on ebay if i took paypal, I sell a lot of outlandish toy and kid-related items, items that people would feel very stupid for purchasing after the fact, and this can lead to chargebacks. I simply cannot afford to deal with a chargeback, I have been using money order/check for 2 years and thats the way its going to stay. I have heard all the horror stories about paypal and done the research, paypal always rules in favor of the buyer when it comes to disputes even if you can prove you sent the item. The buyer can claim its not in described condition or that it doesn't work even if it does or its in better than described condition just to get their money back.
I sell a lot of products to soccer moms who are picky about items so this also covers me if they complain and whine even though I describe items probably more accurately than other sellers, when they start complaining and whining is what could lead to a chargeback as well. I could definitely see a lot of people charging me back when they realized they were stupid for spending 70$+ for that pokemon backpack for their kid and similar instances or once they figure out that the system will let them charge it back just so their kid can get the item they want, then I am in the hole.