If you already have a rabbit then I would definitely discourage getting a 2nd rabbit from a breeder-- especially a baby. Why? If you are hoping to bond the 2 rabbits, there is no way to know whether or not the 2 will actually bond. You may invest all the time of watching a baby grow and then invest the money to get him/her fixed, only to find out then that the 2 rabbits refuse to get along. You'd be stuck having to house them separately, letting them out for exercise separately, etc.
However, rescues work with rabbit owners to ensure they wind up with a compatible match. Their rabbits are fixed (can't pre-screen for potential compatibility unless a rabbit is fixed) and if one potential rabbit simply refuses to bond with your rabbit, they typically allow an exchange until you find a rabbit that actually does get along with yours. (I have had to do this on several occasions with rabbits that were stubborn about which bondmate they would accept.)
On that note, I assume your current rabbit is fixed? It is necessary for both rabbits to be fixed to provide the best chance of a bond to work.
I'll direct you to the following page of my website that explains more about bonding and how age and neuter status affects it.
https://rabbitsindoors.weebly.com/bonding-bunnies.html
To answer your question about whether I've rescued rabbits... yes! I've had rabbits on & off since the late 80's. Over the years I've gotten multiple rabbits from rescues in 3 different states. (All but 2 of my rabbits were from rescues.) The chart below can also be found on my website but it's easier to paste it here rather than type out the pros of a rescued rabbit.
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