Hi all!

I want to buy a USB microscope for honing and other interesting stuff, but the honing is the most important. I already have a 30x jewelers lupe, and use it a lot, so that part is solved I want to make pics of the edges, so thats why I need an USB mic.

What is the cheapest that will suffice? I saw a lot of magnified pictures, and I think that 200x would be enough, but please correct me if Im wrong, and I would need 400x mag.
I was looking mainly at these:

Veho 200x:

USB 200X Digital Microscope 1.3 Mega Pixel Video Camera - eBay (item 170519057655 end time Feb-20-11 18:32:55 PST)

Veho 400x:

20x and 400x 1.3MP USB Digital Microscope Camera NEW!! - eBay (item 160538399850 end time Feb-26-11 16:49:54 PST)

If there are better or cheaper options, Im open to any suggestions.