@johngordon For your larger point, I think this is a sign of our times. There is a vicious circle whereby online retail cannibalizes sales most of rarer items. So stores start to focus more on common goods and that pushes more people online for rare ones.
@currentswithin Hmm. There must be a bug with upgrades. I'll try to take a look soon and will add this to github. Feel free to email me at duerig at jonathonduerig dot com and then I can email you back when I have a bug fix.
@currentswithin Oh. I am starting to remember. There are the things you can buy to unlock upgrades. They are a list in order and each one opens the ability globally for you to upgrade any of your buildings of that type.