Hi there are sellers and buyers group on Facebook for JYJ Asia concert including Thailand. I'm going there as well. Some of them are selling with original price. Just let me know your Facebook account. I'll add u in group. :)

hello again ^^ here all what I found
1- ticket JYJ Concert in BKK Zone B4ㅡ BE 95 96 97 5,530 THB/ticket,all paid
https://pbs.twimg.com/media/BvvQ4jaCUAEvdP_.jpg
line acc : nunanana.ch
2- 2 tickets zone b1 row bk13-14 con jyj in bkk
email : [email protected]
line : linhuiy
that's what I found for now don't know if anyone else will mention me on twitter for new tickets

Unni. Im sorry. I dunno the web is in thai. Hahah. Sorry.

Here it is.

http://www.thaiticketmajor.com/concert/concert-detail.php?sid=2483

And now I just hope that the petition for JYJ con in Malaysia is gonna work. You are really lucky unni. ^_^ … Me can't go. ㅠㅠ

Perhaps you can contact the fanbase in Thailand. Wish they can help you. I'm not going to watch their concert at Bangkok but I will watching jyj's concert at Vietnam. JYJFamilyVietnam helped me to buy the tickets. As for information, I come from Indonesia. Maybe the local promoter work together with fanbase for selling ticket. I'm sorry I can't help. Good luck for the ticket. ^^

I'm not from Thailand but I have followers from Thai if you want I'll post it on my twitter acc this might help find one ^^
is it okay ?