Why not buy one decent pen “shell” and then just buy the plastic tube with the tip and the ink afterwards?
I know many companies use pens for marketing but still, they could apply this too and also stand up for the environment while still do marketing.
They’re also better for writing on bad or dirty paper, non-paper surfaces, and if you write in your hand instead of on a desk (the high pressure threshold makes mistakes less visible for me).
PS
Try out the FPR Ultra Flex EF nibs. I’ve got one of them on a Jinhao x750. It’s not the most practical (it can railroad and go dry), but the flex is so worth it.