Best online registries??

May • 27 y/o full time student & mom of 7 year old with downs and a 4 month old girl. Married to a dreamboat and creating my first online sales website.
I love Target and am a fan of Amazon but there are some expensive things out there and being as this is my second child - in a 7 year gap - I kinda feel weird asking people to spend that much. All of my/his family is so excited and begged me to let them throw me a shower but it's still a lot to ask I feel like for the prices of the quality items.