I recently stumbled upon a classified listing for NOS stationery items, among those, there are some Pelikan Pelikano P10 fountain pens and some Pelikan Twist P20 ballpoint/ fountain pen sets. According to the seller these products were manufactured sometime in the late 80s or early 90s and all have their original boxes, cartridges and documentation. I really don't have much of an experience with Pelikan pens, so I would like to know if both of these pens are good buys or if I should look somewhere else? They are going for about $20 and I plan to use them as everyday writers. Thanks for your advice!