Bob2 asked what defines quality brass.
For me it is Koh and Key in the USA and Masterpiece and Lee Marsh in the UK.
Lemaco and Fulgurex in Switzerland.
I am now severely limiting what I buy as I appreciate my kids may well be left with unsaleable stuff, that despite how beautifully it replicates the prototype with exquisite detail, solder and paint - if there is no demand from the next generation there will be no market for it.
Personal circumstance also forces financial discipline on me. Consequently my builders plate collection has also shrunk to now only late built steam , no one in the next generation is going to want this stuff, accept it and move on.
To prevent spontaneous purchases I maintain a very small wants list and if it doesn't appear on the list I don't purchase it, I now subscribe to the mentality, 'less is more'. I have sold most of the OMI/PRB brass rolling stock that is superfluous in my collection and will soon start with some of the OMI locomotives. ( took a hit on some, broke even on other stuff ) OMI quality even on the last runs still leaves a lot to be desired. The latches are still only etched (???) The Red Caboose plastic GP9 got it right.
as ever, opinion.
nick