Some designers expressly forbid selling items made with their patterns and you don't want to get in trouble. The two that were linked to don't say so you'll need to contact the designer.
ETA: Here's a few sites that do allow it.
"You may sell any item you make using a Lion Brand pattern.
You may not sell our patterns; they are copyrighted. If you would like to give someone a copy, please use the option on our site to send a pattern to a friend."
"You may NOT
sell my patterns
finished items made from my patterns
you may sell
Free Crochet and Knit Patterns
"All patterns are free. All I ask is that you don't copy the patterns to sell or to post on other websites (without my permission). However, you may print out any of the patterns to use to make items for your own personal use or to make items to sell to others or to sell in craft shows or craft stores, through a home craft business, etc."