Not to sure if this is exactly on topic, but do some of these dvd sites release DVD's early if they get them in? Looking at Get Backers Vol #1 the release date is 8/24 *in 8 days* but on few sites ive looked at says Buy Now! that are in this thread atleast one. Just something that caught my eye wanting to see this one.
http://www.animecornerstore.com/index.html