The Apple event on the 7th is coming soon and there may be a new MacBook Pro and with the presence of another newer model, the model you are interested in may depreciate further and you may just grab a bargain by waiting a little while. Also, this issue can be remedied by setting the machine manually to use either the integrated or dedicated cards and you should see no flickering, but this does come with compromises and hopefully Apple will identify the issue and do a recall. The model linked above only has the integrated model and in theory should not be affected but I have heard that a couple of people have had issues, but the seller does offer a 60 days return policy just in case. Unfortunately the current MacBook's don't have the great advantage over the competition that they used to, and if MacOS isn't absolutely necessary, then I would suggest shopping around as you may find better value elsewhere.
Thanks for the info.
I will wait for the Sept 7th event and wait to see if there are any new offerings.
But if not, I'll probably get the used 15" laptop