The cost of cartridges is expensive but I am using compatible ones for my Epson printrer. They are 100% guaranteed to work and are returnable if not. I started getting them from Inksmart for £3.99 but now I have just received some from Coastal Inks for £2.50, free p &p. The compatibles also contain much more ink than Epson's own. I would thoroughly recommend them especially with the guarantee. For too long they have cost too much.
I agree Hugh, I have an Epson PSC too. For the last couple of years I've been pleased with the compatibles I've ordered from 'Choice' good price good selection. Before I knew about compatibles I bought a genuine Epson cartridge from Dixons and it was £14. (one colour) and didn't last very long. Soo to those out there thinking of buying Inks... give the compatibles a go.
We've always had problems with compatible ones in our Epson printer, it doesn't recognise them unless they're genuine epson cartridges and has sometimes failed to recognise genuine ones after putting in a 'compatible' one, may still be worth a try for £2.50 though!
Yes, HP cartridges are on their list but you would have to enter printer model number to find out the cost of them. All I can say is for my model Epson £2.50 is the cost of a cartridge.