If the buyer is just going to send money to you via PayPal for "personal" use, then you don't have to do anything. The buyer isn't too smart doing this, as it offers her NO protection at all should anything go wrong with the transaction - you're a deadbeat seller, the package gets lost or damaged, it's not what you said you'd send,etc. She'd be SOL.
Buy you'd be fine.
However, if you you're going to accept payment for this transaction via PayPal, and she's paying for "goods," make sure you cover your tuchis as a Seller.
Send a "request for money" to the buyer, and clearly state that it is for "goods" described as the "blue coat with pink buttons and green velvet collar, size 10" listed on CL.
Include the cost for postage (via Priority as it's the easiest - free boxes). The buyer should pay for it since she/he wants it shipped. Charge $10.95 (Medium Flat Rate Box). You won't have to pay for the box or label, plus ...see below.
Keep a printout of the CL listing.
When you receive the payment, click on the Ship Now/Print Label button next to the transaction, and follow it through to buy and print the label in PayPal.
This way you (and PayPal) will have a record of the whole transaction, and the Delivery Confirmation number. Btw, you'll get a discount on the postage, plus the DelConf is free. This will help offset the PayPal fee.
If it's an expensive coat (and definitely if it's over $250), you must send it with Signature Confirmation
If you want, you can buy insurance for the package. Note the insurance is for your protection. If the package never arrives or is damaged, the buyer can file a claim, and WILL get all her money back.
Isn't it fun being a Seller? :roll:
Good luck!