As a complement to Lexikaliker’s yellow Wopex, here a photo of the yellow Wopex blister pack available in the UK. I bought this pack of five Wopex plus eraser and sharpener this April for £2.99 plus 90p shipping (~$4.69; €3.70). Unfortnately I haven’t seen the eraser-tipped version from Lexikaliker’s blog post yet, but I will definitely buy it if I ever see it.
East…West…Everywhere wrote a blog post about the green version, available in the USA, that comes with Staedtler-made eraser caps. These eraser caps are basically a white version of the eraser caps that are quite common in North-America Some pencils in North America come with these erasers attached to them, the Magic Writer for example. You can also spot them fairly often in American TV shows, e.g. in Two And A Half Men..
Price: April 2012
Exchange rates: June 2012