PayPal
PayPal is a money transfer company, which help you in transferring funds with in a second anywhere in the world.
Keep in mind that PayPal facility is not available in all countries. There is no PayPal facility in Pakistan. Pakistanis can use PayPal if they have bank account in foreign countries where PayPal is there.
Create PayPal Account:

1. Open PayPal Account https://www.paypal.com
2. Click on Sing up
3. A new page will open on screen where you select your country and then you have two options.

i- PayPal for your personal use.
      ii- PayPal for your business.
Now you will click on “Get started” either for personal use or for business use.
3- A form will open where put information and then click on
“Agree and Create Account”
After this, a new page will open where you will add payment method. Here you can add you Bank Account and Credit Card /Debit Card A/c and then click on Continue.
Now your Bank A/C is your PayPal A/C. With the help of your PayPal account you can pay and receive money easily.
Now PayPal will give you some instructions and you will read and follow them carefully. Mostly these are for testing the function of your PayPal, Bank and Credit Card accounts. They want to check that either money can transfer from PayPal to your bank Account or not

Associate eBay Account with you PayPal Account:
After this, you will login from your eBay account with your eBay-id and password. In the payment option, you have three methods of payments. 
(1) PayPal Account (2) Credit Card detail and (3) Bank Account. You will put all the demanded information in the fields.

Now this is the stage where you can start selling or buying on eBay.