A blockheaded crook swiped $59,000 worth of Lego sets on Long Island and was busted after trying to sell the toys on eBay, police said Saturday.

Gloria Haas, 53, of Island Park, allegedly snatched 800 sets of the plastic bricks from a collector who had locked them up in a storage center, according to Nassau County police.

Haas was arrested last Thursday and arraigned the next day on grand larceny charges.