Just use PayPal on SuperBiiz if your billing and shipping addresses don't match exactly. Their direct credit card processor is notoriously picky and flags orders over tiny address typos. Major cards work fine, but checking out via PayPal skips their manual fraud verification hold so your parts actually ship on time.

Always check the final checkout screen with SuperBiiz. They pop up as the lowest price on PCPartPicker constantly, but their shipping fees almost always kill the savings right at the last step. Unless you’ve got a promo code that offsets freight, you're usually better off buying through Newegg or B&H instead.

SuperBiiz usually hides their promo box right under the shipping estimator in the cart, not the final payment screen. It's often collapsed under a tiny "Apply Coupon" link that’s super easy to miss. If you hit the final "Review Order" page without applying it, you've gone too far and have to back out.

SuperBiiz doesn't do first responder discounts at all. No ID.me or GovX integration at checkout, so don't bother looking. If you want to save, just grab a generic promo code from their email newsletter or run the part through PCPartPicker. Honestly, Newegg usually beats their final total once shipping gets tacked on anyway.