No, a person selling a toy (assumably after legal purchase) for more than the toy retails is not an illegal action.
If there is a short supply of items combined with a high demand for those items, the price of the items will go up. Since retailers cannot normally charge more than a certain percentage over MSRP for toys, diligent individuals will step in and buy as many as possible (further lowering supply) and resell them at a profit.
Making a profit
Someone can go to purchase Christmas tights at various sites around the world wide web. Ebay and Amazon sell Christmas tights and they are at a low, affordable price.
Walmart would be a good place to purchase a Christmas coloring book. Also stores such as staples or local facilities would be a great place to purchase a Christmas coloring book.
If someone wanted to purchase wildlife Christmas cards online, there are a variety of places where someone can do so. Some of these places are Amazon and Wildlife Rapid Finder.
Someone can purchase Japanese Christmas cards on-line at several sites. For example Zazzle, ebay and Redbubble all retail this item at varying prices and delivery.
A person can purchase an optic Christmas tree from numerous stores. Stores such as Walmart, Zellers, Sears, eBay, and Target sell optic Christmas trees.
Someone can purchase many different Christmas items from Bronners. Bronners sells Christmas stocking, ornaments, figurines, lights, nativity scenes and Santa hats.
There are many places where one could purchase sleigh bells as a Christmas decoration. One could purchase sleigh bells at Amazon, Walmart, Target, and Kmart.
There are several online sources one can use to purchase Christmas books. Chapters Indigo and Barnes and Noble are two companies which have many books for sale including Christmas books.
One can purchase Christmas Stocking Hangers online from the Target website. They have many available for $26.99. One can also buy them from eBay and Amazon.
There are many places where someone could purchase a countdown to Christmas calendar. Websites such as Lillian Vernon, Overstock, Magic Cabinet and Target all sell countdown to Christmas calendars.
One can purchase Pfaltzgraff Christmas Heritage plates from the official Pfaltzgraff website. JCPenney also sells them. One can go to eBay or Amazon to purchase the heritage plates at a discounted price.