I don't know what it is about me that makes the cost of printing from home so distasteful to me, but for some reason it is one of the things I most dislike spending money on.
The other thing is that you're not supposed to throw your ink cartridges away because it's bad for the environment, so not only do I get to be bothered about spending MONEY to get new ink, I have to feel guilty about what to DO with that stupid empty cartridge.
At a job I had a few years ago, the supply room was filled with used cartridges (probably a dozen or more) that no one knew what to do with, and I finally discovered that you could print of free shipping labels from HP and send them in to be recycled. I felt happy about that.
Until I realized I could actually be coming out slightly ahead, rather than just breaking even with my empty printer cartridges.
Thanks to some hasty Googling at work a few months ago, I discovered that Staples (the office supply store) has an ink recycling program where not only do they take your ink cartridges off your hands, but they give you $2 in rewards back for each one you turn in (up to 10 per month).
You also get either a percentage (usually 10-20%) or a dollar amount of new ink cartridge purchases back in reward dollars, which means the overall amount you're paying for your cartridges drops a lot.
And then you get to spend free money at an office supply store which, nerdily, is my idea of heaven on earth.