Vintage IZOD Lacoste Sweaters are excellent thrift store finds. Very popular in he late 70s & early 80s. Now they have become trendy and do very well on eBay. The tennis sweater and the cardigan pictured below are the most popular styles.
Here is the latest Vintage IZOD Lacoste Cardigan that I sold on eBay. Not a bad profit for an item purchased for $3.99. I have sold others for as high as $40.00, this is just the most recent example.