If you are going to spay or neuter the rabbit, then some things don't matter as much. While intact rabbits can be a bit smellier, ones that are altered tend to have very little odour. Litter training really depends on the rabbit, but altered ones tend to be much easier to train.
Breeders seem to have more bucks for sale than does. They don't need as many bucks for breeding. It does depend on the breeder and what they get with breedings as far as sex ratio, if they have a lot of does, then they is what they have to sell.
I would recommend looking for a rabbit you like and can afford. Some rabbits can be expensive, but these tend to be the show quality rabbits. Some breeders will have pet quality (may have a disqualification so are not showable) for sale at a lower price. You may want to look into the different breeds so you know what is out there and can narrow down what you may want. Some breeds are not suitable for everyone and some people don't like certain breeds. If you want a smaller rabbit, don't look at the Flemish Giants as they an be 20 pounds full grown. An angora or other long haired breed is not for everyone due to the amount of grooming needed. Narrowing down your choices makes it much easier to pick a rabbit. Don't worry too much about colour and sex, just find the rabbit that you like.
Bring paper and a pen so you can write down the name of the breeder and the rabbit. This lets you go around as see all the rabbit before you make a choice, but you can then remember which rabbits you like. Nothing worse than finding a great rabbit and not remembering who is selling it.
Also take a carrier, blanket, water dish or bottle (both could be good as some breeders use dishes and others bottles). If it is a long drive home, a food dish and hay could be good too. Make sure to get some food from the breeder to transition the rabbit over to what you want to feed.
