Now keep in mind that they do not buy just any cartridge. They are mostly interested in those cartridges that contain print heads, like HP, Lexmark, Dell, Some Canon, Apple, Some Brother, Sharp and older Xerox cartridges.

The reason is because cartridges that are just ink tanks, i.e. print head is permanently mounted in printer, are cheap for generic market to reproduce. So there is no profit in commercially refilling them.

Also, in order to keep highest quality, they are mostly interested in virgin cartridges, those that have never been refilled. You may find some companies buying once refilled cartridges but at a substantially lower price. Many will just tell you up front that they must be virgin cartridges.

These empty cartridge buyers are easy to find. Just do a Google search something like this, "we buy empty inkjet cartridges". I got over 95,000 results with that search.

This company will supply everything you need for fundraisers. http://www.inkbank.com

Here are some others that will buy your cartridges:

http://www.cartridgesareus.com http://www.webuyempties.com http://www.tonerbuyer.com http://www.fundraisingweb.org/listings/recycles.htm

Here is how you can have some fun with your printer manufacturers technical representative. Call their help line and tell them you are having trouble refilling one of their cartridges and ask them for some help because it's not working. Don't expect a warm response. You can expect same response if you called your car dealership complaining that your car won't start after filling gas tank with water! The technicians are trained to drill you to find out if you are using generic supplies or refilling your cartridges. Then if they discover that you are whatever problem that you are experiencing will be blamed on supplies. So you see, weather you are refilling or not, using generic supplies or not, never, EVER, admit this to them or support stops immediately.

If you are having problems most manufacturers will simply send you another printer as long as your warranty is still good, UNLESS it is discovered that you are using generic or refilled cartridges. Printers break down, that's life. But permanent mechanical malfunctions are rarely caused by bad cartridges. If cartridge is at fault simply replacing cartridge will fix problem 99% of time. An exception might be if a cartridge severely leaked inside printer, but I've seen OEM's do this too.

Never send a printer back with cartridges left inside. They will usually tell you to do this anyhow but it's also good insurance in case you left some generic or refilled cartridges in printer. Don't give them any ammunition to use against you.