The decline in sales represented what a spring housing market looks like when it is shut down to fight a global pandemic. There were 339 condo sales to close, down 44%, and 340 single family sales to close, down 41% from the year-ago quarter. The number of condo listings edged 3.4% higher to 1,472, year over year. Single family listings declined 11% to 870 as would-be sellers either…