I've got a few brand new RS232 - RJ45 - 25 pin serial adapter cable for sale for £3.99 each.
This cable is used to connect to POS terminal (via RS232) to your Printer, scanner, Remote display and any other RS232 compatable peripheral device.
Both male and female serial adapter cable available.
http://www.ebay.co.uk/itm/230846180819? ... 1555.l2649
If interested PM me.