This is not a problem!
If the total contribution amount falls short of the gift goal, the registry owner will receive an eGiftCard for the total amount collected. These funds can be applied toward an item in two ways:
1. The value of the gift card can be applied to this particular gift -- and the registry owner can subsidize the difference
2. Or, the value of the gift card can be applied to any item sold at West Elm or westelm.com
TIP: This approach holds true regardless of how many (or how few!) people contributed