Paypal only requires that you have a valid email address and a bank account. When you sell items, you have the option of printing a packing slip for your customer (for free) as well as buying/printing postage for the item. As you sell items and ship them, you will accumulate funds in your Paypal account, which you can ask them to disburse to your savings account in one lump sum or as each purchase is made--or you can use the funds from your Paypal account to make purchases for yourself, which will be deducted from your accumulated amount. Paypal charges a fee to sellers but not to buyers. Their fees are listed at their website. Paypal is probably the SAFEST method for purchasing and/or selling items because the buyer does not have to provide their credit card or bank account information to anyplace other than Paypal. You will calculate your own shipping and handling fees for each item. If you have a business, you may have to charge tax, particularly if the buyer lives in the same state you do. However, if people outside your state buy from you, it is up to them to keep track of their purchases and pay a "Use Tax" (if required) on their state tax forms. I hope this information is helpful!