Toner cartridge capacity for new cartridge v. one that came with printer. ?

My Canon printer cost $29 at walmart. To purchase new toner for it would cost over $40.





Is this new cartridge more full than the ones that come with the printer? If not, is there any reason I shouldn't just buy a new printer each time my ink runs out? Toner cartridge capacity for new cartridge v. one that came with printer. ?
In general, the toner that come with the printer is called a ';starter cartridge';, and contains less stuff than normal or high-cap toners.





Why not look into refill kits? Toner cartridge capacity for new cartridge v. one that came with printer. ?
The cartridges you get with the printer are often trial cartirdges which are only rated to print a fraction of the pages the new one would. The largest Trail cartridges currently being marketed is by Canon, however it is only 25% of the ink a new cartridge would have.