I want to get 80 crafting from 72. I need a free, or cheap way to get there. Any ideas?

Green hides all the way. Alch or sell the finished product. Simple as that.

 

 

 

Don't think you'll make a profit, but it's minimal loss compared the speed you'll gain exp. I used this method all the way to lvl 99 myself.

Ruby Bracelets. ~84k/hour (Port Phasmatys). Sell to someone training magic, or enchant (~135k magic exp/hour for me. Bad for wrists) and sell for 1.3k each, since they alch for the same amount as Mage Longs. I personally went from 65-82 (currently) in a week doing just Ruby Bracelets, and 85-89 Magic enchanting them.

Most of my crafting levels came from air battlestaves (currently lvl 83). I earned quite a bit of money from this actually. Right now, there arent any efficient ways to get battlestaves. Hopefully jagex will fix baba yaga's store soon.