He took the Tube from Charing Cross.
He had converted three thousand of his remaining twenty thousand galleons into pounds which came out to around sixty thousand. One galleon true worth in muggle money was around 20 pounds. However students from muggle families could exchange up to 100 galleons per year which is enough to get school supplies at 5 pounds to the galleon due to ministry subsidies. Shop prices remain the same for everyone and is not subsidised. Any extra galleons have to be exchanged at the 20 pound rate
He also got muggle identification made using gringotts services for an adult version of himself. That had been surprisingly cheap at 10 galleons
The aging potion had been straightforward: he bought it at the apothecary after getting out of gringotts, the result approximately eight years on a casual assessment. Someone who looked carefully would notice the bone structure was still a teenager's, but he was not asking anyone to look carefully. He was asking them to see a young man with a clear sense of what he wanted and the means to pursue it.
The Porsche dealership in Mayfair had the atmosphere of a place that understood its customers were paying for the experience as much as the machine. Six cars on the showroom floor, each lit like something between a jewel and an argument. The salesman who appeared had the trained warmth of someone who could read a customer's budget from the way they walked through the door.
Ron looked at the 968 coupe on the end stand. It was priced around 45000 pounds or 2150 galleons
He had read about it in a Muggle magazine his father kept in the stack under the kitchen sink, which Arthur Weasley treated with the same reverence he gave ancient enchantments. The 3.0-litre four-cylinder, the torque that arrived not with a shout but with a steady escalating commitment, the integrity of a machine built to be exactly itself and nothing else. The coupe, not the cabriolet. Dark blue, almost navy but not quite.
'That one,' Ron said.
The salesman recalibrated. Ron gave him the business address — the Diagon Alley solicitor's office in EC1, perfectly ordinary to the Muggle eye, fully accustomed to receiving correspondence for wizard clients — and said cash equivalent, bank transfer, today.
The salesman became, in the way of good salespeople encountering clarity, entirely cooperative.