Not accepting Paypal isn't necessarily a sign of a problem in my opinion. Many small time sellers simply cannot risk a Paypal chargeback or they way they can arbitrarily freeze accounts.
Years ago I got hit with an $1,100 chargeback from a comic book I sold on ebay. 45 days after I shipped the item and the buyer left positive feedback, he claimed "someone unauthorized used my account" and Paypal said I owed the $1,100 back. Even though I had delivery confirmation and positive feedback from the buyer, Paypal sided with the buyer and I was hit with the chargeback. Still makes me angry when I think about it.
And my story is not an isolated incident. So, I don't blame people for not wanting to deal with Paypal. Because they are not a true bank, they skirt many of the consumer protection standards you get with accepting or using a real bank card.