Why are AM/FM Tuners So Expensive?


I'm referring to NAD, Rotel, etc...

Are they really that much better than what comes in a mass-market receiver?

Thanks!
bday0000
For a lot of information on vintage and some recent tuners check out.
http://www.geocities.com/tunerinfo/
I'm interested to see if/when XM and Serius come out with audiophile-quality rack-sized units, rather than just the car radio pieces they have out now. I'd pay a pretty penny for a well-developed digital tuner that looked good in my system.
Older analog tuners (Luxman, Yamaha, etc.) with all discrete components sound much better than most of today's tuners. Their selectivity is great rejecting reflecting signals far better.
Speaking of components; Mike Creek uses a FM chipset that was made for high-end car stereos, in his current T43 Tuner. He found it to be superior to anything made for (home) audio. I guess it is no accident that it seems like FM stations come in better in the car. The Cambridge Audio T500 Tuner (designed by Mike Creek) has the same chipset.