Walnut Hill, a luxury home with six-bedroom suites, 10 bathrooms and an indoor pool on a 21-acre estate in Peters Township, recently sold to McMurray residents Matthew and Sally DiAngelo in an auction conducted by J.P. King Auction Co. The July 31 auction went on for 20 minutes, J.P. King reports, and 21 people toured the property in the days leading up to the auction. Opening bids ranged from $700,000 to $2.5 million. The winning bidders, represented by Century 21 Frontier agent Lisa Browell,…