I bought something extra pokemon card collection gift 2 last years for my gift closet, and I don't realize that they raise up value from $30 to $90 to $100 on the market now (target/Walmart/Amazon/eBay). I am not sure if they are out of prints or too popular. Is it too expensive for a 6 year old birthday gift? It is a kid from school. I don't want to raise the gift value too high, and I am worried that they may expect more valuable or monetary equivalent next year if we get birthday invite next year again.