> Those $340 refills will contain more than double the toner than the starter cartridges.
The M452dn came with "introductory cartridges" all rated at ~1200 pages. For the CP1525nw, the black 128A is rated at ~2000 pages and the colors are ~1300 pages.
The new printer was ~60% of the cost of a set of replacement cartridges and the starter cartridges are 60-92% capacity of the A cartridge replacements for the CP1525nw.
So yes it cost me less to replace the printer than it would have to replace all of the cartridges.
In reality it cost me a bit more. The CP1525nw actually started jamming on me constantly when the black got to about 1% and the colors at around 5%. The diagnostic codes indicated it was a problem with the ink so I stupidly bought a replacement black which cleared one error code but not the jam. I got a quote for a diagnostic and it was more than the cost of a new printer.