Yes he could do that but to get one for 25k then hes got to buy privately, and have the dedication to get it checked inspected properly not rush in.
Then what happens when he sees the perfect car (he thinks) but the bloke is dead set on 27k? Well now going that other 3k and just buying an OPC car in the first place starts making sense at 30k dont it? If hes gonna save, save more save 10k.
Then 90 days later get on and get the warranty from OPC, i sound like a stuck record about that but its the right way, want a real life example, Will Gill, cracked cylinder on his 997 now, 5.5k bill coming up.