Congrats on the nice surprise!

I had a similar surprise a month ago. I had purchased a Fuji Professional for what I thought was a really good deal. Two weeks later, I went into Performance looking for colored bar tape and saw they had a 4 day promotion that effectively lowered the price of the bike by over $400. So, I asked about their stated 90 day price match guarantee, and whoppee! they honored it. So, I felt the same thing you did - kinda like getting free money.

Now, I'm ashamed to admit that they've since gotten all that money back from me in the form of upgrades and accessories, but that's an entirely separate matter