Sadly, whilst I acknowledge where you are coming from, this point of view epitomises what has gone wrong and why there is already an underground scene - and long may that last, long may it feed the media-hungry, nostalgia-driven, overground and commercial scene which now exists and has dominated this thread. There are many on this 'scene' who know the price of everything and the value of nothing.
Your premise, Ian, is based on the presumption that said record box will by default be stuffed full of acknowledged, relatively high price 45s, probably known, tried-and-trusted to fill most dancefloors - Natural Four (on ABC), Seven Souls, Charades etc etc - we all know the score and we've all heard the same set over and over, ad nauseum at soul nights and niters the length and breadth of the UK. From a personal perspective and I suspect from the perspective of many on this thread, this is not how we see things. Many are interested in the DJ that will stand at the decks and champion a box load of carefully researched items which will not necessarily command 3 or 4 figure prices. All anyone with a limited budget and, more importantly, an open mind and a thirst for sounds new to their ears, needs to do is scour the sales pages on this site day-in, day-out. You will find many, many 45s with potential, many already known, but not widely so, ripe for activation or reactivation. The idea that a viable and attractive playbox needs to have a retail value running into tens of thousands of pounds is a myth. Every record played on this scene started life cheap until someone saw its potential.