I have restocked with guitar strings. I have D’Addario electric strings at £5.50/set and Martin FX strings at £7/set. Both these string sets are the sets I use on my guitars and are beautiful strings.
To make your strings last longer, wash or at least wipe your hands before you play and carry a cloth with which to wipe the strings clean after you play.
You will find that caring for your strings in this way makes for a much sweeter guitar in terms of feel and sound.