This is the cheapest today and no guarantees on stock / price on black Friday.
Circa £80 on Black Friday I reckon
It has reached £84 so far on Amazon, so I think it will hit the lowest of around £75. Can't see it going any lower than that though (not for a while at least)
But will it go lower than £94? £129 at many places today so doubt it will go below this price?
Now changed back to reflect the deal. Loads of lego options using this stacking but some seem over-priced anyway so you would need to check prices elsewhere to see if it is a good deal for what you are looking for.