I saw this on Craigslist. Does anyone know if this is legit or not?

http://www.oklahomacityplasmadonation.com/

Also, my brother's girlfriend has been donating (twice monthly limit) at the new place in Midwest City on Reno (formerly Pep Boys) for $50 each. I'm not sure how to do that...walk in or call to set up appointment?

Any other places to donate blood or this mysterious plasma thingy? Would be great to collect some cash. Never done it myself before.