Like the others said, I would not buy all one brand just yet, but to answer your Q, normally itti have a birthday sale around jan/feb and it is normally 25%off, also during the great nappy hunt (cant remember when that is may???) they will have up to 25% off.
We lurve our ittis here, but I would get something like pop ins for a newborn, they seem to work for most and are OSFM,
GL xx