Here is a nice Amazon deal for you. This AmazonBasics Silicone Baking Mat 3-pack has awesome reviews; over 4500 people have reviewed them with an amazing average of 4.7 out of 5 stars. Right now the 3-pack is on sale for only $8.69, making each baking mat just $2.90. Here is the link to get yours:
AmazonBasics Silicone Baking Mat 3-pack – only $8.69 ($2.90/mat) while supplies last at this price
$2.90 each/Highly-Rated/Baking Mats!