TV executive producer Carter Bays, who created CBS’ “How I Met Your Mother,” has paid $1,285,000 for a 1,768-square-foot California bungalow-style single-family house in Los Angeles’ Spaulding Square neighborhood, according to public records.  In a Big Time Listings exclusive, we can report on the purchase by Bays, who at one time was a writer for David Letterman. Built in 1919 and originally listed for $1,299,000, Bays’ new one-story, three-bedroom house has a wood-burning fireplace in the living room, hardwood floors, and a newly built garage, according to listing information. Check out the online listing sheet for the house. “How I Met Your Mother” has produced no shortage of material for Big Time Listings of late. These include actor Josh Radnor, whose $1.1 million purchase of a house in L.A.’s Hollywood Hills we wrote about on June 19, and actor Jason Segel, whose $2,240,000 purchase of a 2,876-square-foot house on L.A.’s Sunset Strip we wrote about on June 21. And of course, earlier than that, we wrote on May 13 about actor Neil Patrick Harris doing some buying and selling in the San Fernando Valley, and we penned a follow-up to that on May 15.