$11.99 at  
Adorama.com  
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Brother Cyan Ink Cartridge for Many Inkjet Office Machines, 400 Page Yield.

$12.99 at  
PCRush.com  
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Brother Cyan Inkjet Cartridge For MFC-240C - LC51C

$14.30 at  
Mwave.com  
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BROTHER LC51C cyan ink cartidge for dcp130c & mfc240c

$14.99 at  
OnSale.com  
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LC51C - print cartridge - cyan

$17.99 at  
TigerDirect.com  
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Brother LC51C Cyan Ink Cartridge

These cartridges and printers appear to be long-lasting and they definitely are easy to replace. However, I which Brother wouldn't make the printer disable all printing when only one cartridge is low on ink.

Before I got a Brother printer, I'd never heard of Brother. But I love this multi-function center. I can scan, fax and print with ease. I've never had a problem with the ink cartridges either, no leaks, easy to insert and the packages are always wrapped tightly. The only downside is LC ink cartridges are hard to find in stores so thanks for Amazon for having them stocked.

the product came as scheduled, and on time, as well as packaged properly. It was new, as posted on the site. It has not given me any problems, and it was nice to get the product just a few days after ordering.

I have no complaints about the Brother ink cartridges. They are no fuss, no muss...easy to replace. The machine I got through Amazon is a printer, copier, scanner, fax, and answering machine. It was the only 5 in 1 I could find a couple years ago and its working great. Of course, the black cartridge runs out first so I always keep more of them. There is a pack of 4 cartridges available, the 3 colors and 1 black. I get that and a couble extra black cartridges.