I do not quarantine, per se. That said, I also do not buy any rabbit that appears to be the least bit sick, listless, thin, bad coated, or out of sorts in any way.
Since I show, my rabbits are around hundreds if not thousands of other rabbits on a regular basis. They are thrown into show cages that have housed numerous other rabbits that day without any type of disinfection between.
If/when I purchase a new rabbit, I do try to house that rabbit on it's own end of the rabbitry for a short period and not just flop it in the middle of everyone. My cages are stacked 3 high, with a foot or so between them, so no one has direct contact with a next door neighbor. To date, I have not had an issue with a newly purchased rabbit. Maybe I have just been lucky, but I simply don't have the time, space, or desire or have a regular rabbitry and a quarantine rabbitry and do the hazmat thing between them.
If they seem healthy, I would move them when it's convenient.