Having invested a large number of hours in an item does not automatically make that item more valuable, in either monetary or sentimental terms. When we quilt as a hobby, we are choosing to spend our time in a way that will seldom be compensated in the same way as time spent at a paying job. The same is true with time spent cleaning our homes, caring for our children, visiting with friends, etc. The disconnect comes when someone wants to buy a quilt, not understanding that it did not magically make itself. At that point, if you want to sell the already-made quilt, it is pointless to think about how many hours went into it. The question is just whether you would rather have the quilt or the money. If someone asks what you would charge for making a quilt, it's a different question, because you will know throughout the making of the quilt that it is for someone else, and you will be weighing the money against the time and feeling that you didn't charge enough.