I'm Battle Bunker and it was a calculated gamble based off Indomitus(I shifted 90 copies in 2hrs). It didn't pay off so rather than having 4k sitting about doing nothing and taking up huge amounts of space I decided to get rid. Money has to work for you and sitting about selling 1 or 2 a week is not working. I've got my money back now and can invest in other things. if someone wants a Dominion then I can just order one as it seems GW aint gonna run out anytime soon.
As for taking a register of interest, some might find it useful but it doesn't work for me. next weeks pre-orders are revealed on a sunday evening and I have to order the monday morning to guarantee I get what I think I'll need before pre-orders even go up. My gut told me 30 copies of Dominion but incase demand was high I opted for an extra 30 as I could absorb that if it went pear shaped. And as it happens it did go pear shaped but I've got my money back so I'm happy.
And I'll also add the reason I sold them so cheap was to ensure I sold em fast and second so when other stores(who have lots of unsold copies) inevitably follow suit people don't cancel their pre-orders and buy the cheaper box elsewhere....as I've already witnessed, getting in 1st was important.