Got the dreaded 'can't print - replace cartridge' notification and was not looking forward to having to spend £35 which I spent last time just after Christmas (and that was just on a compatible set from Tesco.) Someone told me to try Ebay and I ordered from the site above.
I was a bit skeptical because this was for 3 sets (not just one costing £35) and free postage! However, within 2 days I received the order, nicely boxed and labelled. They work perfectly and I can't believe the money I have saved and have 2 spare sets as well. My printer even recognises them as Epson genuine!
This business has 99.8% positive feedback with 130,070 sales, which is why I bought from them too.
The ink I ordered was for the Epson SX525WD but they sell other cartridges so it's worth a look if you need some or even stock up ready for only £3.09 (depending on the printer cartridge you need/buy.)