Will Books Survive the charity shop ?

Oh what has happened to the world of books ? 
Here I am with a small pile of eleven assorted books, each is in as new condition and none are not still in print. So why,when I check the current sale value on a well known book selling site which has a name that could be a south American jungle, do I find that each title is being traded at the fantastic price of £0.01 plus postage of £2.80. This is an amazing deal for the prospective purchaser as all my books could be bought for a total of  £0.11 plus  £30.80 postage. Sounds great as the face value of the books would be around £80.00 excluding any postal costs.
But how does this happen bearing in mind that most of the books would cost you or me significantly more than the £2.80 just  to post. The reason seems to be the taking over of the second hand book market by in part charity book shops which I understand are now the largest suppliers of books in the UK. Sounds  great, charities making money, but at what cost. You as an individual now have virtually no affordable market for selling your used books, the large book sellers are grossly undervaluing the books they are selling, so what does this do for book publishers who, within months of launching a new title are having to compete with these ultra low prices. The result could be less titles being published as publishers will be looking toward titles that will have large initial sales rather than long term sales. 
Why is the drive to this rock bottom price so prevalent? It can only mean that maybe pence per book is gained by the book seller where really it should be pounds, not the greatest return for charities although some may say the volume of sales make it worth while, but it could be so much more. Some might say this is great as it makes book buying affordable to the less advantaged in society but it relies on someone paying RRP for the book in the beginning, would you?
To me it seems to follow the current trend in the UK of everything at the lowest possible price  regardless of long term cost. In other areas the clothing industry is a great example of this.
So what now?
Hmm....Anyone want to buy some good books in A1 condition?