**What are some of the most sought-after Doctor Who memorabilia items among collectors, and why do they hold such value?
2. **How has the market for Doctor Who memorabilia evolved over the years, and which items have seen the most significant changes in demand or price?
3. **What are some tips for authenticating and appraising the value of Doctor Who memorabilia to ensure they are genuine?
4. **Can you give examples of rare or limited-edition Doctor Who memorabilia and explain how these items were originally distributed or sold?
5. **How do Doctor Who memorabilia collectors typically store and preserve their items to maintain their condition and value over time?
