The $125 Dell eGift card will arrive in 10-20 days and has a 90 day expiration date.
Note that this TV is $29 cheaper on Amazon, so you’re effectively buying the $125 eGift card for $29.
Additionally you can get another $75 Dell eGift card by buying $400 of Dell gift cards via this link.
You can then use the Dell gift cards to buy a TV or anything else. Note that you will lose out on extended warranty protection and other credit card benefits (including the current AMEX $50 off $599 credit) by paying for items with the gift card.