Here is a very simple example of the buy now button:

<form name="_xclick" action="https://www.paypal.com/cgi-bin/webscr" method="post"> <input type="hidden" name="cmd" value="_xclick"> <input type="hidden" name="business" value="[email protected]"> <input type="hidden" name="currency_code" value="USD"> <input type="hidden" name="item_name" value="Teddy Bear"> <input type="hidden" name="amount" value="12.99"> <input type="image" src="http://www.paypal.com/en_US/i/btn/btn_buynow_LG.gif" border="0" name="submit" alt="Make payments with PayPal - it's fast, free and secure!"> </form> 

You just need to change the business, the amount and the item_name

Straight from the Paypal Docs here

Here is a very simple example of the buy now button:

<form name="_xclick" action="https://www.paypal.com/cgi-bin/webscr" method="post"> <input type="hidden" name="cmd" value="_xclick"> <input type="hidden" name="business" value="[email protected]"> <input type="hidden" name="currency_code" value="USD"> <input type="hidden" name="item_name" value="Teddy Bear"> <input type="hidden" name="amount" value="12.99"> <input type="image" src="http://www.paypal.com/en_US/i/btn/btn_buynow_LG.gif" border="0" name="submit" alt="Make payments with PayPal - it's fast, free and secure!"> </form> 

You just need to change the business, the amount and the item_name

If you need multiple items add them like this :

<input type="hidden" name="item_name_1" value="Toy"> <input type="hidden" name="amount_1" value="10"> <input type="hidden" name="item_name_2" value="Bike"> <input type="hidden" name="amount_2" value="20"> 

Straight from the Paypal Docs here

Here is a very simple example :

<form name="_xclick" action="https://www.paypal.com/cgi-bin/webscr" method="post"> <input type="hidden" name="cmd" value="_xclick"> <input type="hidden" name="business" value="[email protected]"> <input type="hidden" name="currency_code" value="USD"> <input type="hidden" name="item_name" value="Teddy Bear"> <input type="hidden" name="amount" value="12.99"> <input type="image" src="http://www.paypal.com/en_US/i/btn/btn_buynow_LG.gif" border="0" name="submit" alt="Make payments with PayPal - it's fast, free and secure!"> </form> 

You just need to change the business, the amount and the item_name

Straight from the Paypal Docs here

Here is a very simple example of the buy now button:

<form name="_xclick" action="https://www.paypal.com/cgi-bin/webscr" method="post"> <input type="hidden" name="cmd" value="_xclick"> <input type="hidden" name="business" value="[email protected]"> <input type="hidden" name="currency_code" value="USD"> <input type="hidden" name="item_name" value="Teddy Bear"> <input type="hidden" name="amount" value="12.99"> <input type="image" src="http://www.paypal.com/en_US/i/btn/btn_buynow_LG.gif" border="0" name="submit" alt="Make payments with PayPal - it's fast, free and secure!"> </form> 

You just need to change the business, the amount and the item_name

Straight from the Paypal Docs here