Because I would save A LOT of money. I have an Epson R210 which takes 6 colours, each cartridge is about $17AUD. Now i can get incredible savings off eBay for compatible ink, but it is not genuine. (Works out to be no more then $4 per cartridge).
Has anyone ever bought ink off eBay before? Does anyone not recommened buying un-genuine ink?
Here's an example: