You should always have a backup plan for the babies you produce - if you're not willing to eat them or let them go as snake/dog food, then you should have enough cages for all of them in case you can't sell. That's just part of being a responsible breeder. I remember us warning that the pet market was often hit or miss with whether or not people are looking to buy and this sounds like you've reached a slow spot. Maybe you need to step back and reevaluate your breeding program - finding a local mentor (especially if you find somebody to help you get into showing which would be another market for potential kits) might be the best way to progress, as they can help give you advice in situations like this or the other urgent issues you come to rabbittalk with.
Show Breeder & ARBA Judge