Instagram shops in Thailand are posts and DMs, not an international checkout. The seller names a price, takes PromptPay or a Thai transfer, and ships to a Thai address. There is no Instagram button on these posts that delivers abroad.
Mailbox
Use a Thai address only when you can pay and the seller will deliver to your suite. That is the same rule as LINE Shopping.
Buy For Me
Send the post link or a screenshot, the price, and how the seller releases the goods. Buy For Me purchases that listing. We do not recommend an Instagram account.
If you want us to find a seller you have not named, that is procurement, from THB 10,000 (approx $300) per order. X sellers and Facebook Marketplace are the same kind of order when there is no cart.
After it arrives
Intake photos, then the shipping calculator. Check what you cannot ship before you pay for liquids, aerosols, or replicas.