most (in not all) canadian airsoft retailers have some form of presence on ASC, this includes wasteland willy.
if you look his user name up you can see for yourself he has no negative feedback (under his trader rating). which lets you know if there are any complaints about his service. also, you can search his name and see if there were any investigations of people being screwed over. If there were a preferred place to report crappy retailers to everyone's attention, it would definetly be on ASC.
From everything i've figured out so far, ASC is full of legitamate and reliable retailers. wasteland willy definetly looks like hes a part of this category, so i'd say the only other thing you need to do is contact him yourself if you have any concerns.
Also looks like hes on vacation till the 17th, so sit tight.