The isotope prices, which have variously doubled to quadruppled since the introduction of fuel blocks last year - oxygen isotopes are least affected because no fucker uses them anymore. Since POSes are needed to react t2 materials this is going to have a big effect for t2 goods. While any reaction with technetium in it remains profitable, the others increasingly aren't.
So t2 prices are going to go all over the place. People are bailing out of lower end reactions to either switch to tech products or cash in entirely. In the short term thats going to push the price of tech, and hence t2 products, up. In the medium term the overproduction of fullerides and nanotransistors relative to everything else is going to drive the price of the former down just as the price of the later starts bouncing up hard. I have no idea what will happen to t2 prices then.
If you pay attention you could probably make a tidy profit by cornering the right material when it hits the bottom of its price cycle.