It's funny - I was at a (Gothic) wedding a few years back, where one of the editors at Marvel UK was in attendance, and started telling me about this new project - 1602 - that they were releasing.
He also mentioned something about how they wanted Neil Gaiman to write a preface, but his fee was high for them.
At this year's Worldcon I was talking to Neil Gaiman about fees, etc, and mentioned my impression of what the Marvel editor had said. Neil then stared at me like he was going to floor me.
He said that apparently 1602 was produced when Marvel was in the process of being saved from bankruptcy, and somehow in this process the rights for 1602 ended up being set up in such a way that Neil Gaiman apparently doesn't receive
any royalties from sales of 1602 in the UK.
So buy your 1602 from the US, folks.
ADDED: Disclaimer - Of course, this is only me perception of what different people have said. It sounds like the overall story could be more complex and that I could have misunderstood it. Apologies if that's the case.