You are correct in principle than nitro is not hard to find here anymore, but I do think that it is still expensive. As an example I would pay around $9 for one litre of 80/20 fuel (pure castor, no nitro) and about $16 for 10% nitro (still 20% castor) and this is from the same manufacturer, so about twice the price in order to get 10% nitro in the fuel. I sometimes buy nitro on its own to blend my own fuel, and if I remeber correctly it is something around $50 for a litre. So most of us here still regard nitro as an additive, best used in small amounts only.

The best no nitro engine I've seen so far (or own that is) is the Webra 1.8cc speedy, runs beautifully completely stock on 80/20 fuel.