<form target="PayPal" action="https://www.sandbox.paypal.com/cgi-bin/webscr" method="post">
Mark...I'm not an expert in html coding, but I believe the word in red should not be there! I don't know a lot about the PayPal "Sandbox" feature, but I believe it is only for testing your PayPal button operation before actually publishing the page. I think it allows you to go completely thru the "Buy Now" process, including payment and receiving a purchase report from PayPal. BUT, it is all not real. Just a make-believe purchase. No charge on the credit card, etc.

I would suggest that you load one of the "old Pages" into BV and just copy one of the buttons that does work. Then you can preview the page and try the button. Of course you don't want to go thru the entire purchase process, but that would tell you if I'm right.

Don't save the altered page til you see the PayPal button works!

Edit: As an after thought...If you would try to break up your paragraphs, they would be easier and faster to read especially for us really old fellows!