Identification
To check the authenticity before you buy Bunnykins, look on the back (for plates) or on the bottom of the items to find the Royal Doulton stamp. Online resources like antique-marks.com and chinafinders.com.au have pictorial examples of the various makers' marks used by the Royal Doulton company throughout its history. Sister Barbara's name can be found on pieces dating from 1939 up to the mid 1950s.
Sources
You can buy Bunnykins on the Internet through online auction sites such as eBay, retail and discount websites like johnlewis.com and Amazon, as well as through online antiques dealers like rubylane.com. Retail giant Macy's also carries the line of collectibles. With all the sources offered, shop around to find the best deal when you buy Bunnykins.
Considerations
The Royal Doulton International Collectors' Club is an organization dedicated to Royal Doulton enthusiasts. Members get to add to their collections with exclusive offers to buy Bunnykins that are specially commissioned. They also receive updates on collecting matters and an illustrated quarterly magazine.