i may be wrong, but i'm assuming they tested the waters with iv and printed a lot of copies. then when v came around, they only printed around the amount that iv sold (maybe a bit more). they may do the same thing with vi, so i'm preordering that one this time.
Anyone interested in picking up a used copy of DQ V, or any of the DQ's & FF's should check out a local game store....cuz honestly, I love Amazon and do alot of shopping here....but I can get some of these games ALOT cheaper at my local game store! ;) just a suggestion!
If you're looking to buy new, and don't want to spend more than the MSRP, you can order it directly from Square-Enix's website. $39.99, with a few bucks for shipping. All in all, it's a lot better than what most people are charging for it nowadays.
they got you to preorder? Mission accomplished! By making DQ V rare, they make you scared into preordering all the other DQ games. So though you may not have V, they are making more money by you ordering all the rest. That's what I've done. Now I will have ALL of the DQ games, although I still can't find V anywhere!!!