Fast return:
Use a group of free GV accounts to text some sellers on craigslist super low balling them, then swoop in with a slightly higher low ball. Buy, sell for ~original asking price, repeat.
Medium term return:
Arbitrage on bitcoin?
Long term return:
Buy a domain, woodywoodsman.com. Buy a knife. Put up a free wordpress theme. Sell shitty cats you whittle out of wood with your knife and free wood found on the side of highway. Save enough to buy a chain saw. Make chain saw carvings. Sell by the highway where you found your first piece of wood.
Rinse and repeat all across the country.
I mean, fuck, it's $200 - what kind of ideas do you expect?