My first buns were shop brought ( 25 + years ago before I knew about rescue buns) but when they died I had a break from keeping rabbits. Then my next buns ( dutch sisters) Katie and Amber were re-homed buns from a friend of my sister in law who didn't want them anymore. Then along came Holly, who was abandoned in a box just before Christmas...someone brought him to me as they knew I'd look after him (vet said he was a she at the time, but fortunately I noticed before he had chance to make babies!).
My recent buns are Bugsy ( re-homed from a friend of a friend) then Steffi was his wifey, from a rescue, but unfortunately we lost her to a fox when she escaped the outside pen and hid in bushes and refused to come back indoors. So then I got Chloe (impulse buy from P@H to try to console my autistic son who was distraught at losing Steffi) I know I should have got another rescue bun, but I ended up with Chloe, who was lucky I got her as she had an un-noticed eye ulcer.
Then I got Poppy, (another bun who wasn't wanted) from ex's sister-in-law. Then I fostered Pebbles, when his owner went on "holiday" and left her neighbor (my friend) feeding pets, only to find out she wasn't coming back. Again pebbles was lucky I had him..day after I agreed to adopt him, I took him to be neutered, only to find a huge tumor in his abdomen. We had tumor removed and subsequent hernia fixed and he has been the loveliest bun I have ever had!
So I have had a mixture...but knowing what I know now, I would always go for rehoming unwanted buns that would end up in a rescue, or go directly to rescue centres.