Wholesaler Closeout parts are RockAuto's "clearance rack." The parts were acquired at discounted prices from companies liquidating inventory (because they were overstocked, decided to carry a different brand, went out of business, etc.) and are new but may be older inventory ("last year's style").
Find the Wholesaler Closeout parts along with "Regular Inventory" parts. Or to see a full list of all the closeout parts available for your vehicle(s) that can probably all ship in the same box, click the RSS icon after selecting your vehicle’s engine size in the RockAuto.com catalog, then click on the "HTML" icon next to "Love a Bargain?"