I was looking at similar ones on ebay, but the ones i was looking at said they were DEPO these don't say. I tend not to trust ebay unless they specifically say all the information. Also the ones on unmitza do look funny. I thought I had looked at those before but on these you can't even see the lines on the glass like most of the other ellipsoids.
I would say keep looking. If you want them off ebay wait a while I say some for like 50 less than that for the same thing.
<a href="http://imageshack.us"><img src="http://img217.imageshack.us/img217/3466/quicksignature20te.jpg" border="0" width="600" alt="Image Hosted by ImageShack.us" /></a>