[bschiett]

what products are you going to sell? it really depends on the product.

if it is a physical product, just keep proof of sending the order on file such that you can prove to paypal that you've sent the goods.

if it is a digital product I recommend you get a specific service to deliver the product and handle the transaction, such as shareit, clickbank, digital river, ... they know what to do with chargeback for digital products.