I don't understand why one would pay this much for prefilled cartos. I mean, so you use 'em once and even if they're as great as you say, then what? Do I chuck the $2 thing, or refill it?
If I'm refilling anyway, why
buy them prefilled?
If I'm discarding them... well, I go
through at least five 510 carto refills a day now, and that would be a bit exorbitant.