I received my COE yesterday. I booked a SHA hotel for 1 night test and release in Bangkok for 4900B. If you subtract to PCR test out of this and the transfer and meals i guess it wasnt too bad. It was quite easy to book. It took a bit of time to issue the proof of booking. I am assuming that the hotel needs to upload all your information to some government department. So its not a straight forward book online process.
The hotel needed my passport details, The rip off covid insurance, Proof and dates of vaccination, Flight resrvation. All this appears on the booking confirmation that i received.