Chris, my personal, unqualified probably, opinion is that there has been a lot of talk about the rare pieces of Mdina and therefore many people strive to just purchase or find the rare pieces. In doing so, they forget that there is a lot of very beautiful Mdina out there regardless of who made it or how old. They also don't realise that there are few makers in my opinion (apart from studios perhaps), that make multicoloured glass in fab shapes and in more accessible quantities/costs. Therefore by not buying more contemporary, or a wider range of, Mdina they are missing out on some fun and gorgeous pieces perhaps because it feels less 'special' because there are so many pieces (and I do think that is the Caithness syndrome)?
Think of all the seahorses and paperweight that are out there and listed. It kind of swamps the other pieces in a way. I look at most Mdina pieces and think they are beautiful because of the colours/shapes etc. I recently sold my jug. I am pretty sure there wont be another out there very like that one. It had a gorgeous rim and was beautifully made, lovely colour, but not a lot of action going on in the glass to be fair. It sold for a lot less than I thought it would, and I had to list it twice (payment to counteract the two pieces I have bought recently).
I also think there is so much Mdina around that people are able to 'collect' types or colours or era, which then means that pieces that fall outside of those 'collecting' areas lose out. I have various pieces now and do have a small collection of one type. But I know that at the moment I would struggle to sell any from that collection so I've not listed the one I want to sell in order to buy something else. It's not dissimilar to Whitefriars is it though? in that the textured pieces (generalising here) seem to be the ones that command the high prices whereas the more elegant sophisticated earlier pieces seem to command much less - as I said, that is a generalisation but you get my drift. Again I've just sold a vase that went for £8.50. Not a lot for a very beautiful piece of glass which weighed a ton and was very elegant. Had it been Finnish mould blown it would have sold for a lot more.
Perhaps it's just the market's peaks and troughs though?
m