Amazon has the 55-Piece LEGO City Monster Truck (60251, 2020 release) for $9.31 - $1.32 off coupon (check "Apply coupon" box) = $7.99 with free shipping on $25+ or with Prime.

• LEGO DUPLO My First Fire Truck (10917) for $6.74 - $1.15 off coupon = $5.59
  
• LEGO DUPLO My First Tow Truck (10883) for $7.99 - $1.60 off coupon = $6.39