Mail return for a in-store purchase

I purchased a PSU at the NJ Microcenter on my way home to New York. I should have checked prices before purchasing it, but I didn't. It's being sold for almost $100 less by Newegg (direct from them). I used a credit card to purchase it (Mastercard.)

I contacted live chat asking for help price matching it, and I was told it would only be in-person. I live five hours away from this store, so I asked if I could return the PSU for a refund. They said that it is only in-store as well.

Is this official policy? Am I simply supposed to eat the price of a "guaranteed" price match if I'm not willing to drive?