Absolutely not. The person who told you the amounts was out of line as the nature of a gift is that people give what is possible for them to give, not who gave what amount. I would simply say, thank you along with your note and leave it at that. Let me know if I can be of further assistance
Ah, I see. In that case, she had to tell you the amount. No, I still would not mention the price, as it's not about the price, but the gift card itself. Everyone who contributed likely knows how much the card is for. Just say thank you, XXXXX XXXXX you're sure you'll be able to get something nice, etc.