If someone sent me to a gift registry with the minimum gift being $200, I probably wouldn't buy a gift unless it was my grandkid or something.
What I noticed at my son's own wedding was that they got an incredible amount of stuff; and ended up exchanging over $600 worth of booty. As for a wedding shower put on by the bride, I have to ask why. Is she not going to have a wedding party/reception?
I always thought the wedding shower was a celebration with the close girlfriends and female relatives to the bride. You can't tell me that expensive gifts are expected from those people too? and what kind of party would it be if they're all fighting?

The wedding is the celebration of a marriage. In our culture, we celebrate it in church and/or with a party (called the reception) afterwards.