We offer PayPal and credit card processing through PayPal. However, if someone asks to pay by money order, bank transfer, check, or cash we certainly don't deny them. Checking fees with the bank are usually lower than PayPal's fees anyway.
Do you find that more options have helped get more sales?
Definitely. There's tons of options to pay with and if you accept most of them you're opening yourself to a lot potential business that other companies lose by not accepting that payment type.