The Disney Store Online currently has a coupon for 25% off. Use coupon code DISNEYPAL to redeem this offer. If you are from America and have spent $75 or more, shipping is free. They don’t really have a selection, but they do have a few Star Wars and Super Heroes sets.
Note that the items have been marked up by $5-10 so potential savings are less than 25% off. The best deal would probably be The Milano Spaceship Rescue as that is priced at $79.99 (reg.$74.99) which has a $5 markup. With the 25% off, it’ll bring it down to $60 which works out to be 20% off (and that’s probably better than the other sets with the 25% off).
Thanks to forum member grymg for the tip.