powerStore payment gateway
I did see that Powerstore did not work with standard Paypal so I did not purchase it when it was on sale. Then, this thread says that you can use standard Paypal if you use Powerstore with ECart but a link to showthread.php?t=2776&highlight=paypal+standard says that you can't use the inventory tracking with Paypal standard.
This is very confusing and my the number of threads related to this confirms I am not alone. This really needs some clarification.