Since I do some selling online and believe me, you will not pay off the car or house and maybe a new Macro lens... in a couple of years?

The reason I promote Wirestock, beyond the fact that if you join using my link, I get 10% for the first year. (and I hope you make a million dollars, it costs you nothing. Not taken out of your earnings)) is, for someone who wants to try selling stock photos, it's easy to join, they distribute to major agencies, they track everything and take 15% for keywords and distribution.
(spammy paragraph removed)
Now about Flickr and selling images. As far as I know and all the data I've seen, NO.
I don't know if this one is even alive anymore. Back in 2010:
"Flickr members can turn on a “Request to License” link on their photo pages. The link will show right next to the licensing information. When a member makes a request, Getty Images reviews the photographer’s work. They will contact the Flickr member and help handle details like permissions, releases, and pricing."
And on Flickr, help: Asking can we sell our images on Flickr?
"We can all order prints and books of our own photos through Flickr, but not other people's photos in that way.
With a paid-for account ('Pro') you are allowed to sell your own photos via your account (this is notionally not allowed from Free accounts), but you would have to organize printing, delivery and pricing yourself."
I hope that was helpful and as far as everything I know and can find, Flickr does not sell licenses for our images.