The ticket prices for this World Cup are a joke, the starting prices are double any previous World Cup and they're using dynamic pricing, so it's likely many tickets will be sold at much higher prices than those currently listed.
If you are lucky enough to get a standard ticket for the final, they start at over £1,500 and go up to over £5,000, with corporate tickets up to £25,000.
So far, my son has tickets for two group games in Dallas, but very annoyingly not the England one, so he'll obviously try and get one when he's there.