An advert for a TM contest suggests that they are only upgrades.
Top Prize A pair of the best seats in the house, backstage passes to meet members of the band before the show and a signed pair of Lars’ drum sticks used on the tour
2nd Prize A pair of the best seats in the house, pre-show party passes including the Memory Remains exhibit of band memorabilia, food and beverage, the t-shirt of your choice and a limited edition tour poster
3rd Prize A pair of the best seats in the house (Three more winners!)
4th Prize A pair of floor tickets and Snake Pit Passes (Five more winners!)
Plus one lucky grand prize winner chosen from all entries on the tour will get to fly on a private plane with a band member to a gig!
At the shows I went to there was a dedicated entrance to the snake pit behind the stage, so I doubt the location of your actual seats matter. Were it me I'd [after confirming premise] scalp the fairly expensive floor tickets, buy the cheapest seats in the house, use the profits to party like a motherfucker. Or, if I lived down the proverbial street from Tim [after confirming premise] tell him to buy the cheapest seats in the house and then swap them out so-as to offer up a very generous upgrade. That would have the added benefit of surprising your cousin even further. "Eh, they're cheap nosebleed seats, see."
One thing I don't get from that contest is what the "best seats in the house" are supposed to be, since they're clearly intended to be better than the snake pit. Good lowers wouldn't be. Neither is the on-stage VIP. They had plenty of VIP seating out at the sound-board area, but those wouldn't compare with the snake pit. Not sure what they're getting at.