VMInnovations offers the Intex 10-Foot Easy Set Above Ground Pool, model no. 56921EG, for $67.95 with free shipping. That's the lowest total price we could find by $30. It's 30" deep and comes with a filter pump.

Update: As a reader discovered, Academy Sports + Outdoors has it for $49.99 plus $11 for shipping. Sales tax is added where applicable.