Me & My Photoshop

This is one of the two front windows to my shop/studio. One half of the shop floor is a small studio and the other half is full of frames, photo albums and kit bags. Not much in the way of cameras or lenses. It's my job to change that around a little and start selling some hardware but these windows are not helping. I think my main problem is the windows are not secure, so either we have to spend money or get very creative. I can print posters, put in a PC screen and find a cloth but other than that I'm clueless. As you can see, we are right in front of a bus stop so there's a captive audience for just about anything. Any suggestions welcome.