European to reg will probably restrict prices to a similar range as .us - although if the germans and the UK like .eu they'll be higher, these markets are huge.
Multi-lingual aspect of europe will hold back the prices.
.info/.biz were launched while the domain market was in a bit of a rut, now the market has matured and improved I'd expect the price to rise much more rapidly than .info/.biz/.us
As always, premium single word domains will be valuable.