Roger Majorowicz’s metal sculptures can be seen in museums and galleries around the world, but the biggest collection of them probably resides at the Whitefield house he called home for the last 30-plus years of his life. Almost all of those pieces, along with dozens of other items Majorowicz collected during his 83 years, will go to the top bidders at Saturday’s estate auction. “In the state of Maine, we don’t see these true estates come to market any more,” said Rusty Farrin, of Farrin’s Country Auctions.