Amazon UK has LEGO City High-Speed Passenger Train (60051) for £69. After conversion to US dollars and shipping, it comes out to be about $100. This is about a 33% discount on the regular US price.
For this case, it’s cheaper to import than buy locally. Just add the set to your cart and use Amazon’s currency convertor at checkout to see the final price in US dollars. It’s currently the #1 selling brick set on Amazon UK at the moment.