I’ve found a sofa on Gumtree that has been imported from Dubai. It’s just occurred to me that it probably doesn’t have any fire retardant labels as presumably the laws are quite different out there? 
Would it be a mistake to buy it? Should the seller not even be trying to sell it? 
It would be for our own private use but of course safety is very important to me. 

If it's been imported direct from outside the UK and not via a UK sales entity it neatly sidesteps the very old pre-internet domestic furniture safety regulations. Therefore it doesn't need labels nor need meet any safety requirements and could be as dangerous as the pre-regs foam filled furniture of the 70's & early 80's

On the other hand I don't know if Dubai has any furniture regulations - if they do it might be completely fine. Unless you can research the law there it is a bit of a gamble (a quick Google didn't reveal anything obvious)