I can't remember exactly how much I bought mine for but it wasn't too expensive, I think it was between £6 and £7. The seller who I purchased from doesn't stock them anymore but there are still sellers on eBay selling for around £12.
There are two type main types of journals I go for: the usual standard black, A5, "conservative" type (which makes up a good percentage of my whole collection) and then the quirky "cute" type. This falls into the latter category.
If only I could find notebooks like these in UK stores. All we have are giant Pukka pads!