Please be aware if you are selling your items it is at your own risk and please follow the rules, if you need any assistance please ask a moderator or an Admin.

I would suggest people use paypal, but it is entirely your choice.

Rules
Sale / Trade threads must be accompanied by photos of the items you're selling / trading.
In each photo, you must include a piece of paper with your Alias hand-written on it. Don't have time or don't have a camera? Too bad, in either of those cases, you shouldn't be selling / trading and you won't be. Photos must also not exceed 800 pixels in width.

No bumping your sales thread.

This is not a place for begging. People will not just send you something for free, even if it's your birthday. If you're a minor, please ask your parents for assistance on making a purchase here.
No posting eBay auctions that are not yours.

- Caution when dealing with minors.
If you really must deal with one, take some procaution. They may include asking for their parents to make the deal, ask for a contact number so you and the parent can speak over the phone.
Get the parents involved. If the parents are unaware of what the child is doing online, that's never a good sign.

1: Save all transaction information
Save all the information you had with the opposing dealer. Name, Address, Number, Payment Information - they can all come in handy if you have to report a dispute or call local authorities.

2: Payment Methods
This is a hard decision with all the scams now.
Be sure no matter what you sell, include: Insurance and Tracking Number or Delivery Confirmation.

Sure it costs a few bucks more, but they will come in handy if you have to report a dispute with eBay, your Credit Card company, & or Paypal. Being out a few bucks is better than being out a potential few hundred dollars.
In most cases, the buyer should be paying for these fees anyway.

Cash - be sure to verify at your bank they're not fake.
Checks/Money Orders - verify at your bank they're not fake, even if there's a holding period.
Paypal - Always ask for the paypal to be made direct from their bank, or an echeck to Paypal first.
Credit Card payments can be risky if they order a Charge-Back.
Money Wires/Direct Bank Despots - Avoid!! Do not conduct any deals that requires this.