It seems like most of my responses are from people in the yarn community who know the cost of sock yarns (the one I used was $29, which makes approximately 3 socks, so a pair and some for a scrap project). My point is: if you receive a handcrafted gift, it likely cost more than something similar from a store and took many hours to make. Instead of trying to monetize it for the crafter, just say thank you and appreciate the gift.