well this a question in everyone's mind.
when i personally started earning about a year ago, the price was about 700+ $$$ but now its almost triple. i earned a few satoshis with free faucets and multiplied  them by playing games.i have list but mostly i use them, below are these with brief explanation:

http://xbtc.eu/?ref=915265 : (this one is best for xapo wallet.)

if u want to make faucet "Auto Collect". there is a specific software included in the site:
it auto collects 20 satoshi minimum to the wallet (only xapo wallet)
no need of hassle of every 15 min to visit the faucet for claiming. try this one out.