Be careful on sizing as their sizes AREN'T consistent from year to year. The seller says that this one is from 2004, so the sizing now is probably fairly close. BUT, the early seasons (Reflection, Solitaire) had quite different cuts and sizes, which were slightly different from the middle seasons (Follow Me, Strip), which then were different from the more recent seasons. More recently, the cut has become larger and more democratic as Dior has gotten more and more popular. In the early days, if you were less than 6' and weighed more than 75 pounds, Dior was a tough fit.
Anyway, as others have mentioned, at a size 44R US, you may find Dior to be a tough fit if you haven't worn a lot of it before. It looks GREAT on somebody who is really tiny, but for anybody larger than a36R, it sometimes just doesn't work. I say that totally from experience (I'm 6' and 155 pounds and often Dior is too skinny for me). That being said, if the bidding stays low, for less than $500 it may just be worth a try. If you win it and then aren't crazy about the cut/fit/etc., I doubt you'd have difficulty selling it and getting your money back.