Well it's not that u can't trust MY ppl it's just how much u can trust if u never meet such a person. Diff country or location sure got scammers everywhere heck try to china or hk see got ppl tryin to swindle money from u or not if they know ur not local.
It's the typical mindset of locals tryin to gain from 1st timers. Best is to take ur time and dont listen to what those ppl claim they can provide also if what they claim is not up to ur liking just reject.
Bout the dong guan budget with 5K yes can go there already heck go danok, bangkok also can get "models" the thing is not everyone can have their passport chop without good enough excuse.
Willing buyer willing seller as well.