Indeed there is demand for this. There's also demand for other suggestions that have been around for quite some time, such as this one which has been around for 5 years and is the most popular suggestion.
Duplicate threads are marked as such. The thing to do is to like the first post in an existing suggestion that is still open (no matter how old) as first post likes are a factor in suggestions that may make it into the core software.
Hopefully some of these older, popular suggestions will make it into XenForo 2.X at some point.
How is the PayPal gateway used? I'm new to XenForo, and while I'm hoping to bridge it with my WordPress site, I'm new enough that I don't know exactly how that will work. (I just bought XenWord and am very hopeful that it plays well not just with my site but my PayPal/Content/User plugin.)