Gday George,
Just read your profile , similar situation to me.
I've been living here about 6 years, and have been travelling to the region for many years before that.
Some parts of SE Asia are "snake pits " for °µÍø½ûÇøs looking for a retirement destination.  I've lost count of the number of men that have limped back to their homelands physically ,mentally & financially crippled.Â
If your worried about the rip offs , just remember common sense is your best deterrent. Most of the rip offs are usually only for pennies.  Once you know what the going rate is for Taxis, transport, food & accommodation etc, the rest is what you learn along the way.Â
Some learn the easy way, some learn the hard way.  Same everywhere in life. Â
There's one thing I've found to be consistent. I rarely , if ever had a local person approach me that hasn't wanted something.  Don't fall for the old "can you teach me English" bullshit. Most of those can already speak it.
I've found most of them were only looking for someone to "bank roll" a business venture they or their family had.  The language talk over coffee evolves into a joint business venture to save the family from ruin.😉
If your single, and don't want kids.....I can't stress enough the importance of a vasectomy. That's the biggest downfall of a lot of guys here. They are the "anchor daddies" ...stuck in sham marriages & relationships and are slowlly sucked dry with emotional black mail.  The smart girls play the " long game" .Â
That is, they know your financial limit. OK..they'll then involve your family back home via Facebook or family visits etc and try and establish the emotional connection with the child's °µÍø½ûÇø relatives.  Once they've sucked the anchor daddy dry, they've already "groomed" the in laws and start working on them for mysterious child illnesses and education expences. They've tapped into the family blood line.  I know guys that have been dumped , and that blokes elderly parents are now sending money for the little kids well being.  Mum is just pissing the money up with her Vietnamese boyfriend. 😬😬 that kid will be the "gift" that keeps on giving down through the generations.   Great stuff eh....
So don't worry about paying $5 for a $3 Tshirt or not getting enough Bo in your Pho Bo that your only paying $1.50 for.
Your rip off protection starts between your ears , and between your legs.