I really don't know! I have one queen sized quilt (a bargello, but it's not twisty, just a 2-width one) that I'm selling for $600, and I feel priced out of the market. It took me about 60 hours of actual sewing, plus probably 6 hours choosing fabric (there are 29 in it!), plus probably another 2-3 planning it all out and cutting and ordering the fabrics. All in all, I guess it's closer to 75 hours (I did not hand-quilt it, just quilted along the diagonals with my little Singer). But, it's done with 3/8" seams for durability, and all the corner seams (on every block) is back-stitched. I made it to last! I got materials on sale for about $115, but non-sale market value for them was about $230. So, paying myself $20 an hour plus the materials cost (not counting machine depreciation, etc.) puts the price at about $1750!
But no one would buy it for that much, so I'm trying to sell it for $600 (which, after actual materials costs, pays about $6.50 an hour, not even minimum wage!). And that's more than many other people sell theirs for.
I don't want to be rude, but people that sell quilts at cost because they want to are kind of ruining the market for the rest of us
So instead of just selling quilts, I've moved on to selling smaller quilted items that pay me a decent hourly wage but don't knock people off their feet with the price. For instance: $20 for potholders, ~$70 for a large table runner, $45 for a set of 4 placemats, etc. I will not drop the price on that quilt. I'd rather have paid $115 for it and love it like it should be loved!