Lots of concern these days about "fiat" (paper) currencies. The big bailouts, first by the US, then the Eurozone, combined with profligate govt spending, huge budget deficits and weak global economic growth have undermined confidence in the four major currencies: Dollar/Pound/Euro/Yen. Sure, the dollar is the "tallest midget" right now, but that position is tenuous, given our huge deficit issues.
Commodity prices are currently under pressure, while labor costs are basically holding steady. Combined with sluggish economic growth, I would be surprised by any price increases in near term.
More likely to see price deflation for the time being. Longer term inflation is a bigger threat.
Ongoing supply and demand forces will always exert influence on price movements. Especially in the secondary/resale markets, where sellers have more pricing flexibility.