Aftermarket Ink Epson R280

After being held to ransom by Epson today at nearly $20/cartridge for R280 ink I need a more reasonably priced alternative. Epson printers often sell for less than an ink refill for the same machine.( Sort of like the drug dealer who gives out free samples to get you hooked, knowing you will be back ).

I have seen various vendors on ebay selling refillable systems for a fraction of that. Have any of you folks had any experience with these, and if so, which would you recommend? All I use the printer for is to make contact sheets and print discs ( black type only ) so nothing too fancy.

Thanks