The decline in sales represented what a spring housing market looks like when it is shut down to fight a global pandemic. There were 415 condo sales, down 51.8%, and 86 single family sales, down 16.5% from the year-ago quarter. The number of condo listings rose 2.7% to 5,722, year over year. Single family listings declined 11.5% to 671 as would-be sellers either pulled their listing or…