Awesome idea. This thread will save me so much time.
Please post a screen shot of the ad, along with the link, so that we don't have to click on the links just to find out they were lame. Also, CL ads quickly expire, so this method preserves these works for future generations to see.
In Windows hit Alt-Print Screen and then paste it somewhere; on Macs, apple-shift-3 for the entire screen or just apple-shift-4 for a box.
'72 Honda CL350 (running again!)
'91 BMW K75s