I just ordered two of these SKB F20 and one of the SKB F19 pens on eBay. The F20 is $3.29US and the F19 is $2.98. I watched chrisrap52's YouTube video on the F19 and thought I'd give them a try. For these prices it will be a lovely surprise if they turn out to be nice writers but no biggie if they end up being tossable. I bought a pack of three Uniball rollerball fine points the other day for more than these three pens. I know they are plastic, but I like the colours and the clear feeds. I also like the F20 body style as it matches my Kaigelus and my Picasso. But mostly, I like that they have a blind cap that unscrews and has a silicone O-ring the seals the bottom and there are no metal parts in the section, so the converter can be tossed and these pens used as eyedroppers. The transparent version that chrisrap52 reviews is a little more expensive. I purchased one F20 in green and one in black, and one F19 in black. Here are the colour options for both pens: