How about making a "ransom note" sign for your window, muses TGtbT.com: "We have your winter coat" ..."favorite jeans"..."perfect wall art"... and tying it into your ads and social media, adding "and we don't ask a king's ransom for it either!"
Google Image Result for http://4.bp.blogspot.com/-g33YsoKP8F8/UKFoqG-hmSI/AAAAAAAADuo/jPWk5zAektk/s1600/pinecones,%2Bpine%2Bcraft%2Bideas,%2Bacryllic%2Bdipped%2Bcones,%2Bchristmas%2Bdecoration%2Bideas2.jpg
This charity shop window just blew me away! This could easily be a high street retailer. It is chic, minimal and really shows the garments off as singular pieces but outfit built as well with the bags. Shops adopting this kind of window over cluttered and full windows, could easily price items up double the amount as it looks so chic.