You never know what you might find at garage sales and lockup auction - as one lucky antiques collector found out.A painting bought for less than $50 at a garage sale in Minnesota might be a lost work by Dutch post-impressionist Vincent van Gogh. Measuring 45.7 centimeters by 41.9 centimeters (18 inches by 16.5 inches), the painting, dated 1889, is believed to have been created during the artist’s stay at the Saint-Rémy-de-Provence psychiatric hospital in France just months before he took his own life, aged 37. Van Gogh’s “lost” fisherman painting The painting depicts a fisherman wearing a hat and...