I wouldn't want to make something that someone else picks out the fabric and pattern, then it becomes a chore to finish it. But if I have many that I've already made I wouldn't mind selling. I was making dolls for awhile to give to the children at the hospital I worked at. Every once in awhile someone would ask to buy one and I'd sell it to have more money to put back into my dolls. But I tried making one on order and I could never satifsy the lady asking for it. she was wanting an African-American doll the exact shade as her granddaughter. Do you know how hard that is to find?
You have to be firm in your asking price because many people think that handmade means it shouldn't cost much. Don't underestimate your time and hard work. If you bought your fabric on sale or had it in your stash for 20 years and only paid $1 a yard for it, don't sell it like it was $1. Check out the fabric prices now and price it out as if you had to replace that fabric today.