In Jan 2009 Apr 2010, the price of bitcoin was basically none - No exchanges or market, users were mainly cryptography fans who were sending bitcoins for hobby purposes representing low or no value. In March 2010, user "SmokeTooMuch" auctioned 10,000 BTC for $50 (cumulatively), but no buyer was found.
here is the auction link
https://bitcointalk.org/index.php?topic=92.0source
https://en.wikipedia.org/wiki/History_of_bitcoin esp the price and value section.
What seriously

i wish I was in Bitcoin at that time. The price was too cheap, if i had a time machine i would go back and buy those bitcoins.
As for me the interesting thing i know about bitcoin is those who decided to tatoo their public bitcoin address on their body. You don't have to open your smartphone just show your tatoo if you want to receive bitcoin. Actually there are some interesting thing about bitcoin but people have mentioned them above like bitcoin pizza and faucet with high rewards, so far those are most interesting things about bitcoin for me.