yeah...Most of us wants smth unique, fitted and original. If you want a nice replica, then you have to pay around $300-$400 to get nice materials like imported satins and taffetas, and $600+ for a silk dress. For $100-$200, you can get a nice dress, but it won't be made with super nice materials like the original designer dress. Of course, if you want an exact replica, you will be better off buying the original and pay the alter fees. An original Maggie dress isn't that expensive anyway, plus you can always find Maggie dresses at sample sales.
However, can your guesst tell the difference between silk organza and synthetic organza (Maggie dresses aren't made of silk anyway)? NO! Do your guests care if your dress is really beautiful or not? NO! Does the designer dress really make the bride 3 times more beautiful? nope (disagree? go watch Say Yes to the Dress, my FI and I laugh our a$$ off every time we watch that show on TLC).
I think it is just a personal choice on how to spend our money, I like to spend on real blings that I can wear everyday instead of a few hours or just invest in the market to make more money to buy more blings...LOL.