I believe that most patterns have a disclaimer that you can use to sell a few just no "mass" production. If you have any questions or feel uncomfortable you can email the pattern co/designer and tell them what you are doing it for and see if they have any objections. If I were doing a quilt for auction I think I would stick with a good sized lap quilt, they can say something like wouldn't you just love to snuggle under this while watching tv! I recently quilted one for a friend of mine and it was the Disappearing Nine Patch (free pattern out on the web) and it was done scrappy in all beiges and was absolutely beautiful. The raffle quilts I have done have all been Queen but you are hitting a larger audience - we normally make around $3,000 + on the Relay for Life quilt that I do each year.