In the UK, AV gear can be found for considerably less than in most other European countries. Obviously some high street stores are still a rip but you can always find a good price if you look a little. In Portugal (for example), there just aren't any places like Richer Sounds and it's all very expensive. You're usually paying 1.5x to 2x the UK prices.
If you compare prices to the rest of Europe (not the US) then I think you'll find that ripoff Britain doesn't exist, except perhaps for cars which are a special case (due to wildly differing car tax regimes in different EU countries).
Anyway, getting back to the topic, there are two SR4200 reviews from What HiFi? on the Marantz site allthough all you can get are the summaries, not the original review.
The summaries are:
With its superb all-round performance, the Marantz proves that its still well worthy of the Best Buy tag it won in our Awards 2001.
What the Marantz definitely has in its favour is the ability to sound confident and involving with music. Its still the Best Buy in this market sector.
and
This Marantz entry-level multichannel receiver has just about everyting.
If you are into movies and music, the SR4200 is a first-rate performer: an ample 5 x 70W per channel thrills with gutsy and dynamic sound, and the sparkling stereo is the best weve ever heard at this level. A breathtaking product.
It got a 5 star "best buy" rating from What HiFi? in 2001 and 2002.
Michael.