Not sure if nationwide but Watervale has a box of Papermate stuff near the self checkout.
In the box they also had
* Profile Pen 2pk Black and Blue
* Replay Premium Pen
* Inkjoy 2 in 1 Stylus
Most of them go for around $4 each so, about $3 saving on each item.
so if kilometric pens were originally marketed to provide one km of ink per pen, does that mean for a 2 pack at $1 we should be measuring the performance/value in terms of km/$ eg 2km per dollar?
That's my calculations, but of course your mileage may vary