PayPal Send money free, and accept payments by major credit cards for a fee of 2.9 percent of the total payment plus 30 cents. paypal.com

PayDirect Like PayPal but with slightly lower fees: 2.2 percent of the total (plus 30 cents). Accounts are FDIC-insured but don’t earn interest. paydirect.yahoo.com

BidPay Want extra security for your online-auction payments? You can send a Western Union money order. Fees range from $1.95 to $4.95. bidpay.com

ProPay Better for large-volume sellers since the high fees (a $35 annual membership, 3.5 percent of the total plus 35 cents) decrease the more you sell. propay.com

c2it Lowest of all rates, at 2 percent of the total plus 30 cents. You can also send international checks and direct deposits for $10. c2it.com