Burgundy Turtlenecks from TheRealReal
If you'd rather not spend much, consider buying this Alexander Wang Turtleneck. It's a wonderful piece for a good price. Another strong contender for your wardrobe is this Jil Sander Rollneck. While the price of this product is not very high, it will definitely attract a lot of attention. You might also want to consider this Bottega Veneta Rollneck. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.
If you can afford to spend a little more, you're in luck with this Chanel Rollneck in stock and waiting for you. You are guaranteed to fall in love with this piece.