idk i have one and scared to change anything because im not sure how to verify to be seller or add another payment option...well really to lazy to find out now but im letting it age longer like a bottle of wine.
You cannot accept money orders or checks on eBay - if you can make an arrangement with your buyer, go for it =)
You can use something other than Paypal but there seems to be a requirement for maximum of 16% of sales to go through other processors...on eBay US at least. Correct me if wrong other knowledgeable peoplez.
I would recommend more than 4 positive feedbacks before you do selling.