There's never been a better time to buy if you're a Brit.
Quentin Smith says in the AOPA magazine General Aviation that the dollar's fall has knocked £40,000 off the price of a new Raven II compared to its peak. The price of a new R22 has come back down to around the £100,000 mark.
Obviously the same applies to any dollar-priced aircraft (most are) being bought with sterling or Euros. And it looks like the dollar still has some distance south to travel.