Target via eBay offers the LEGO City Fire Helicopter Set, model no. 60010, for $16.99 with free shipping. That's the lowest total price we could find by $13. This set includes 232 pieces.
Also available is the LEGO Star Wars Anakin's Jedi Interceptor Set, model no. 9494, for $38.99 with free shipping. That's $6 under last month's mention and the lowest total price we could find by $16. In addition to the spacecraft, this set includes Anakin Skywalker, Obi-Wan Kenobi, Nute Gunray, Security Battle Droid, and R2-D2 mini-figures.
Of note, as we reported yesterday, the LEGO Chima Worriz' Combat Lair Set is still available for $25.99 with free shipping.