Zillow, the real estate internet site identified for estimating property values, explained on Tuesday that it would exit the business of promptly obtaining and providing properties amid heavy losses and that it planned to let go about just about 25 percent of its personnel. The announcement was a big strategic retreat and a black eye for Richard Barton, Zillow’s main government, who established the business 16 yrs ago and has extensive talked about transitioning Zillow’s common web-site into a marketplace. Final year, Mr. Barton predicted Zillow Delivers, which created instant gives on houses in a practice acknowledged as iBuying, could produce $20 billion a yr. On Tuesday, Zillow, which explained…