Ian, one thing you have to understand is the "free" ink cartridge in most new printers is less than half full.
They do give away printers to create a market for cartridges tho.
That is the same philosophy with these panel bundles. They know once that is wired in they have a built in marketing opportunity for breakers.
OT****
I have several old printers around here but the only IJ I really use is the DeskJet500 because it is the best bang for the buck on ink, when you can find it and I got a bunch of them for free when State Farm tossed them.
I usually use my laser printer because it is cheaper per page for a better printout and I still have a couple matrix printers for labels and such. I also have a thermal receipt printer that comes in handy when you need one.