It means that one of the two must be a combined cartridge containing three colors.
It means that the consumers have to shell out money for three colors to replace one color.
In addition, a combined cartridge contains less ink than three individual cartridges.

There is only a single tray at the rear to handle papers.
Its not one that can hold hundreds of pages, but it is suffice for low volume printing needs.
The printer itself is never intended to be a high-volume unit, after all.

The Canon iP2580s connectivity is limited to USB only.
This means that the initial cost of the printer is actually a bit higher than the quoted price.
Direct printing from a camera is a luxury that no one should expect from a printer this cheap.

Wired and wireless web link support are nonexistent too.
The good news is that the Canon iP2580 is fairly good at printing.
It can crank out pages at a satisfactory speed.