The price is absolutely fixed, you only need to watch a few hours of shows to realise this. As I've said in a previous thread, I am thinking of starring in my own tv show where I 'psychically' predict the end prices in every Gems/Rocks auction.
The presenters need to get their scripts straight as they make contradictory statements about the prices all the time. For instance, I have heard Ali D say: "I had no idea this was going to such a low price..." and in the very same presentation, "Okay, that's taken us to under £30, so we've done our part, but you know me, I take the prices really low and you'll never believe the price we're going to for this..." Make your mind up, duckie.
As another example of the obvious pre-arranged prices, remember the much hyped multigem necklace and bracelet which went into 'historic' big quantity auctions? They went to £129 and £89 and have gone to those exact same prices ever since, so all the flannel about being able to get the price really low because of the huge quantities was baloney. Every time they appear, whether in quantities of 2, 5, 6, whatever, they go to the magical £129 and £89.
We all know certain necklaces go to £19, rings to £24, earrings to £39, etc. At the higher end of the scale, you can watch the bigger Tookalon necklaces go to £89, and I can spot the rings that will finish at £249 a mile off.
Very cynical and not a good way to treat the customer. I agree with Argey who has said many times that she would prefer to see the end of the auction format and just be given a price that they wish to sell for. This auction malarkey works to the seller's benefit more than the buyer's even though they constantly state that they are "giving" things away. Let's face it, you don't become a multi-millionaire by giving away your product. How long before the price pledge is a thing of the past? After all, there's no pledge to be made when an item goes to the exact same price or higher each and every time it's shown.