Blabaer is 300L per year (200 750mL and 400 375mL I believe), only available at Olbutikken, and roughly $40-50 US per 750, depending on DKK exchange rate. 50N has been produced twice, with the first batch being about 6 years ago, and I believe this recent batch was around 2700 750mL bottles. Only available at the brewery, and the price seems to be creeping up, but around €15 for a 750. Edit: all of this to say who knows? Shipping to Europe is expensive, and so are plane tickets.
I don't believe Cantillon releases bottling numbers for stuff they sell at the brewery, but it's a good bet that 50N has way more bottles than Blabaer (since they only release 150-300 750's a year, I think). And I'd also guess that Blabaer is way more expensive since it's like $40 equivalent and I don't see Cantillon charging 30 Euro for a beer.
Prior to the release of the new batch of 50n they traded a lot closer due to the small amount of 07 50n in the trade pool. When compared to Blabaer, the new batch of 50n4e is less costly, has more bottles, and is easier to purchase over a much broader period of time.
