That seems like a reasonable price. Looking at recent sales just the 5 rare autos will cost about $1,400. Another $100 for the 2 uncommons and $50 for the rest.
The wardrobe cards are kind of crazy, the 3 Penny costumes cost roughly $225 (Penny's top alone goes for around $125) and the rest average close to $25 each for about $350.
That's already about $2,100 , add the binder with the exclusive costume card and the inserts and it's a good deal considering current prices.