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what is a dusenburg

It's a car, American made in the early to mid 20th century that were the epitomy of well made cars in most cases.
http://www.joetourist.ca/lasvegas/images/00003038a.jpg

Try using google if you want to find out more.

what is a dusenburg
It is the greatest car ever built. Duesenberg produced cars under its own name from 1919-1937, and specialized in high priced, I8 power cars. Founded by brother's Fred and August Duesenberg, the AMERICAN (not German, Duesenberg was based in Indiana) company was the first American make to win a European GP (1921 French GP), firth to put hydraulic brakes on passenger cars (Model A, 1921), first to put idiot lights on its cars (Model J, 1928), and made some of the fastest and most expensive cars on the planet. Duesenberg is widely regarded as one of the best car makers to have ever existed, having produced high powered (b/t 80 and 400 hp) cars during its short time in business.

expensive?

hard to find

Expensive and hard to find. Duesenbergs today cost anywhere from $80K (for an A) to $5 million (for a unique SJ). In terms of rarity, only about 1100 Duesenbergs were ever built, among them, 481 J's, of which about 350 survive. Your average J goes for about $700,000.