It is worth considering that for every baby you sell that's one less bunny that could be getting adopted from a shelter... and the people who end up with the babies may not spay/neuter (which usually runs a couple hundred dollars at the vet but comes free with the adoption price on a shelter bunny). They might even dump their baby at the shelter when it hits those nasty hormonal teenage years and they find out just how expensive it is to get a rabbit fixed. At the very least, that cost is something I would recommend discussing with potential owners of the babies you hope to produce.
I guess what we're all trying to get at is that rabbits are the #3 most common pet in the US and, much like cats and dogs, there is a serious epidemic of rabbits in shelters. I myself just brought two home earlier in March, one of which had been there for five months (after being found abandoned in a park at 6 mos old) and there were numerous other rabbits waiting to be adopted as well.
ANY deliberate breeding of rabbits to be sold as pets inherently has a negative impact on the shelter rabbit problem *even* if none of those particular rabbits end up in shelters, simply because there are more homeless rabbits than homes seeking them. Please bear in mind that in no way am I trying to say that "breeding is bad" or trying to shame anyone who breeds. I am not. BUT... I think the vast majority of us here at RO (including both pet owners AND breeders) agree that breeding should be done with the best interests of both the rabbits and their respective breeds in mind (heck, even meat rabbit breeding is done carefully to select for certain traits).
In order to breed responsibly, there has to be some sort of gain or benefit to the rabbits/their breeds to offset the impact of adding to the pet rabbit population. This is why people in this thread, many of whom I recognize as being responsible breeders and/or involved in the world of rabbit shows are putting so much emphasis on their advice to find purebred rabbits of known/proven lineage and excellent temperament if you want to breed. By doing so, you can help advance the breed(s) you choose to work with, contributing towards the goal of healthier, cuter, sweeter, happier rabbits, free of genetic defects and other unwanted traits.