OP, I hope you have your polite spine polished up for when other people want the same bargain you are giving to this person!! Unless your "strings" are about 6" wide, that is a very low price. That's the trouble with doing a favor for a friend, they tell everyone what a great deal they got and where they got it!! Then you get the "You made her one for $400, why cant you do it for me?"
When we were making and selling hand-quilted quilts, we did lose some business when the imported quilts came in. But a lot of people still wanted a traditional quilt. The stores where we sold them would tell us about who bought them, many times it was people from Europe and Japan who were visiting our country. (US). And yes, some were over $1000.