Added a valuation for this, based on last ebay sale.
Had gotten in the habit of thinking that the previous issue: Now 14, was the one that was scarcer, for some as yet unknown reason, and attracted the proportionately higher values, but recently, this one is really drawing the attention of the crowd, it seems (again... who knows why!).
The value I've added is for one with booklet, and yes, it really does achieve these values... and regularly!
(In fact, it often hits the mid to high 40s, although more optimistic listings ask for £70 and over, which I can't say I'm that sure they will ever achieve).
More generally though, the earliest CD editions in the series, seem to have hit their max, and even begun to tail off a little - Now 4 is still a huge piece of change to get, but not as excessive as it has been (£600+ in some older cases), whereas Nows 8 and 9 (the other earliest single disc editions, had been getting up to around the £100 mark, but seem to have tapered off to about £50 - £60 a go....
... But it's these eary double disc "fatbox" ones (Nos. 10 - 20-ish) that have seen the most growth in values recently, this one in particular.