You guys are clued in to something I did some research on in the late summer. There is a window of big exclusive sets from late 2014 and early 2015 where the dollar to dollar price differential is as small as it get when comparing US LEGO retail to Canadian. I think with the collapsing dollar LEGO sets released closer to mid 2015 and after will see a bigger differentials again as LEGO adjusts. Any Lego set sold in Canada is about 20%, on average, higher the USA price, so I've targetted sets below 20%.
The biggest winner right now is the T1 VW at only a $10 difference or 8% differential.
Tumbler, Slave I, and Simpson's House are next at 15%. The Haunted House was 15% when it was still on the shelf
Sandcrawler is at 17%.
Sydney Opera house and Parisian are at 19%
Sea Cow, Ewok village, Fairground Mixer, Triple E, VW Mini, Benny's Spaceship, Ecto 1 are some good examples sitting at 20%
Upcoming Helicarrier looks to have a good differential of 14% if it is indeed $400 vs $350 US price
There may some mainstream sets and non-exclusives that fall under 20% as well but I haven't found any of note. My spot checking of prices shows differentials of much more than 20%. I like Santas Workshop but at 29% it is a tougher pill to swallow. I've avoided the big creator buildings because they were consistently marked up 25% to 33% above USD. Even the recent Detective is still 25%.
So there you go, if there other gems that are priced right please add to the list. Not that I don't pickup EOL sets at a higher differential when I can but when all things are equal I'm looking at T1s, Tumblers and maybe some more Simpson's for 2015