1: Look at the address bar at the top of the window. If there are any capital letters in the address, change them to lowercase, and try again.
-About 6 months ago, Webs changed the format of links. Suddenly, links with capital letters stopped working. By then, I had over 70 models. I went through and fixed as many as I could, but between here and Paypal, some slipped through the cracks.
2: Depending on site traffic, some links will say they are unavailable. Save the link (copy it from the address bar at the top of the window) and try again in a few minutes. If it still doesn't work after an hour, let me know, and I'll research the problem. (Make sure you give me a good email address so I can send you the working links and ask questions).