I could not afford a new iPhone so I tried the used phone section at a shopping mall. Walked around several shops comparing prices and ended up buying an iPhone 14 Pro Max 256GB in 95 percent condition with 89 percent battery for 18500 baht. Meanwhile the Apple Store sells the new iPhone 15 for 34900 baht. Saved almost half. The shop gave a 1 month warranty and exchange within 7 days. The trick is to visit multiple shops negotiate prices and check condition carefully before paying. Been using it for 3 weeks with no problems at all.