They rarely come up for sale. There is only 120 or so. Truth and Rumors the book about the 904 lists every car and who owns it. The book is $80, so I havent bought it yet, so I can't tell you who owns one in your part of the country.
I have seen three. Two at the Collier collection in Naples, Florida. A red and a silver. And another silver at auction in Monterrey in 2007. It sold for 500K or so.
I think one sold last year in Europe for around 700k. When new they were $7500. In the 70's they were $10,000 in the 80's $40,000 then they took off with all the other cars in the late 80's early 90's to about 450k. They so rarely sell, if you want one you just pay whatever. The one in Monterrey was ratty to say the least. A 2- car or worse. Many have a 911 6's in them rather than the expensive to maintain 4 cam 4 cylinder. Those normally have the old engine in a crate.
No photography was allowed at the Collier, so I have no pictures. Here is the one from Monterrey.
Prettiest car with some of the worst racing graphics ever.