40L is a very common size, isn't it? I mean, that brings its own issues, in that any 40L available on Ebay (or on a clearance rack or wherever) will have many interested suitors, whereas a 7.5E shoe will probably not be too popular.Finding a 7.5 E at a significant discount is going to be very tough, because as I'm sure you know, it's a fairly uncommon size. Welcome to my world; I have the same trouble finding 40L suits on eBay.
As for the sizing, I would trust a professional opinion over my own. But that's just me. At the same time, you have to be comfortable walking around in the shoe. If you're not comfortable in your shoes (literally and metaphorically speaking), you're in for a world of hurt. :icon_smile_big:
Anyway, it looks like you can get them for $210 at the Shoe Mart.