Just came into the 90 day window for booking theCity Night Line (CNL) train from Munich to Venice. The only cabins I'm interested are "2 persons in Deluxe Double" but it's rather pricey: 480,80 euros total for two adults (~$644 US).

Is there any way to get discounts on these tickets or are these somehow considered the advance purchase fare already?

Trying to weigh the train trip against staying in a nice hotel, then a budget airline from Munich to Venice (Air Dolomiti seems to have the best prices so far). My heart's not entirely set on train travel, although it would be a novel experience. And I love the idea of going from city center to city center. But USD $644 seems a bit much. I don't see anything on bahn.de indicating discount fares.

A few other questions:

* What about cancellation policies? Even at this what-seems-to-me-to-be-too-expensive-at-the-moment-price, what does it cost to cancel? Sometimes I like having reservations in my back pocket so I can decide later.

* Saw a self-print option online, but read elsewhere that it requires an "A4" paper size vs. what U.S. citizens would be familiar with in printing boarding passes. So if I purchase tickets should I have them mailed?

* If delivered, it asks for a street address in the format: <street, number>. For proper delivery from Germany to the U.S. should I use something like "Main Street, 123" or "123 Main Street". Pretty lousy postal delivery in my area and I don't want any confusion for the carrier (I get mis-delivered mail semi-frequently).

UPDATE: There's a point in the booking engine where it asks for passenger ages and has a "No Reduction" drop-down, in which there are items like BahnCard 25, BahnCard 50, etc. Is possessing one of these the only way to get advance purchase discount fares? And can a U.S. citizen purchase one of these online? Would the cost of one off-set the train fare sufficiently to make it worth while?

Finally, can I book CNL tickets with something like Citi ThankYou, Chase Ultimate Rewards points, or BA Avios points? Thinking "no" here but thought I'd ask anyway.