i do not give a price of what i spent to make the quilt - it would be far lower then what the quilt would appraise for since i dye/paint/etc all my fabric instead of using mass produced fabric lines.
my customers know what they paid for the quilt and could have it appraised if they so wish.
my friends and family that might receive a quilt as a gift know that i do this for a living and know the prices of my work so they too know the value and could have it appraised if they so wish.