Why spend megabucks on a tuner?

Well vintage tuner's make great nightlights. Actually, Unclejeff hit the nail on the head. Listen to hear new music and remind yourself about great music you don't yet own or just haven't pulled out and enjoyed for a while. After listening to Jeff Buckley sing Leonard Cohen's song "Hallelujah" last weekend I knew it was one I had to buy. What a voice! As an aside, saw that download speeds could be at dialup speeds by 2010 due to gridlock as consumer demand increases. Wonder how that will affect streaming.

Sorry I'm late to this discussion. I have just replaced several components in my main listening system and am now listening through a wonderful pair of JM Lab 927Be Speakers. I've been a regular listener to two local stations - one classical and one college jazz station - that do not compress their signals. I have a nicely restored McIntosh MR-73 Tuner that I had restored about six years ago that does a great job picking up local stations. One of the things I enjoy about my morning listening to the classical FM station; is the vast number of CDs they play as well as news broadcasts on the hour from the BBC. In some cases, I will chase down the CD at a local shop or make a point of seeing the piece performed live by our local Oregon Symphony.
While I'm more than aware that many of the stations compress their signal; I'm blessed to have two that I listen to frequently that don't. By the way, I bought the
tuner through an E-Bay auction at a great price and even after the restoration - with a new glass panel and new bulbs - I could easily sell it for more than I paid for it some six years ago.
It's easy to dismiss FM radio if you don't have any great stations to listen to, but I'm fortunate to have them.

Answer simple. With a LP or CD you have to buy cd or venyl.
As we can't listen to cd with out a cd in! right? Radio station cost nothing... So i thing it a wise investment.

How does broadcast quality compare to live streaming of the same broadcast?

I have a MD FT101A I paid 350.00 for it from an audiophile that was moving back to France back in 2005.He also had a pr of speakers and speaker cables that Kevin Voecks made for him. I use my tuner on a regular basic.Mostly in the mornings with classical stations as well as WMNF Tampa.It has a very nice sound that a couple other tuners I've owned did not have .So it was money well spent.