A few years back I purchased a Samsung laser printer for $100.

The cartridge lasted about a year and when I went to purchase
a replacement , Samsung wanted $100!

I purchased a refilled unit for $30 and I am now on my 2nd year
with it! A few weeks back, it started to streak just a bit. I removed
it and re-inserted it and all is fine.

You might be surprised at the NOS you can find on eBay from legitimate
sellers. I replaced the streaking cartridge with an unopened OEM cartridge for
$35, including shipping. It works perfectly.

I just purchased spare power supplies for my HP notebook, both OEM, and
dirt-cheap.