People buy $50k/year of Visa gift cards at staples. You won't get flagged in such a way that it does squat to your account long term. If you haven't ever made large purchases you may get a fraud alert, but that *doesn't* mean you have a problem with chase. Just call and clear it up and you will be fine, $3k won't even show up on their radar.
My staples has $100 amazon I think as the max, so prepare to get scratching Don't buy Visa gift cards to do anything but liquidate directly, or you are just wasting the fee money.
Edit to add, if amazon and staples have tax, yes have them pricematch, because you will also get staples rewards. If amazon is no tax, buy the gift cards..