When a private person sells a property to another private person, that's a business transaction, not bribery.
Interesting to note that particular quote was from mid-2015, when he was finishing up reducing his business interests in Saudi Arabia to almost nothing. Every report of Trump's "financial ties to Saudi Arabia" can't quote anything more recent than three years ago, save Saudi travelers not on government business staying in the NY Trump Hotel.
And once again...if you apply consistently to others the standard to which you hold Trump, Clinton has much stronger financial ties to Kingdom. You won't, of course...on the basis of "That's different, so shut up!"