nintendo Game Boy Advance GBA Castlevania Double Pack Konami 2006price

how much is the Nintendo GBA game Castlevania Double Pack by Konami from 2006 worth?

Castlevania: Double Pack for GBA is a compilation of two Castlevania games: Harmony of Dissonance and Aria of Sorrow. A complete in box copy, in great shape and with all its promo inserts, is worth around $20. A factory sealed copy might fetch as much as $30. The games is severely overvalued by eBay sellers. It was still available for purchase brand new direct from Konami until very recently, so new copies are plentiful.