That is strange indeed Main Index - PhotoPost Classifieds
testman with testing
Feel free to see what you get there. You can send me admin login and ftp through the contact us link because as you will see we are getting two separate actions here.
Lines 65-69 should read this in buy.php
Content visible to verified customers only.
There are two variables. $adamount which is the price passed to paypal. Then there is $price which is the one shown on the form to you.