Among the bounty of top lots up for acquisition during the red-hot November sales, Texas-founded Heritage Auctions stakes a claim —you might just pick up some treasures here while other collectors aren’t looking. Heritage’s department head, the erudite European Frank Hettig, has assembled a trove of modern and contemporary offerings that tilt to Pop, on the block in two big sales. First up: Saturday, November 2, prepare to bid on works by Warhol, Lichtenstein and Indiana (whose “Beyond Love” retrospective at the Whitney is among fall’s blockbusters). Then on Saturday, November 23, a cache from a tony private collection — billed as “Property of a Distinguished Gentleman” — comes to auction, including a pair of Lichtensteins and a Rosenquist, alongside the inimitable Motherwell and rediscovered op artist Vasarely. Preview lots and bid in advance at fineart.ha.com.