Should I buy Halo: The Master Chief Collection?

So I have a friend who is into the Halo series, and I've been thinking about getting Halo: The Master Chief Collection on Steam because I want to start getting into the Halo series, but I've been wondering if I should buy it now or wait until it goes on sale. I'm pretty familiar with shooters, so at least I know gameplay won't be a problem, but I still need to figure out if I should buy it now or wait until it goes on sale.