THIS JUST A TEST...I AM NOT REALLY SELLING ANYTHING
The PayPal gadget quit working but it was fixed.
A workaround was posted to the help forum by user TennisRatings:
You can also create an HTML page using the code and host it in Drive or DropBox and insert it using an iframe.
Examples using the Paypal Simple Storefront gadget:
HTML file inserted from Dropbox
Paypal form code for Buy Now inserted into html box
Paypal form code for Shopping Cart inserted into html box