I have a few pairs of BNIB shoes listed on eBay currently, all my listings state No Returns. My listings all give measurements of the shoes and I offer to give advice on sizing since the brand I am selling has very erratic sizing between different styles. A nice lady from another forum used the BIN option on a pair of shoes a few days ago, she has already received the shoes and she said that she loved them, she left glowing feedback and everything seemed good. Well today I receive a message from her stating that she has tried the shoes on again and realized that they feel a bit too tight and she would like to exchange them for another size that I currently have listed. Or if that was not an option, she wants me to send her the receipt so she can go to the department store where the shoes were purchased and exchange them there. Any thoughts on what I should do?