when you answered that person about the amount of days you have this up for, you said you "need the points"... did you mean credits or is there a point system on here as well that I don't know about yet?
Then you need to change it to 6.00. Free shipping can't be conditional. That person tricked you into changing it to free shopping. Once you say it will ship for free you can't charge for shipping. Just so you know
You can't base shipping on what someone tells you they will bid. That's what I'm trying to tell you. You upgraded it to free shipping. That's person tricked you into putting free shipping. Once you change it to free shipping you must send free.