If you are breeding your geckos, then automatically you should consider yourself a "breeder".
If you are running out of room, then you need to either stop breeding immediately or starting selling the babies. Running out of room will also lead to running out of resources and not being able to give every gecko the proper care.
Most people who breed their geckos intend to sell them.
There are several ways to do this.
1. You can find a local petshop which you feel will give the babies the proper care as well as educate any potential buyers on what they need to care for one of the babies after buying. You wont get as big a profit this way (the pet shop will need to make more money than they give you), but it will create more open space for you to continue breeding. Also, you will be able to visit the pet shop to see if any of the babies have sold, as well as make sure they are all still healthy and receiving good care until they are bought. This way you can always buy back (at a larger fee though) if you feel no one else is going to buy they babies or the care they were receiving is declining. And then try again with another shop. - Its not always the "best" option, but sometimes it does work out very nicely.
2. You can post adds to sell the babies on this site as well as other sites designed for pet buying/selling. With this option you may make more of a profit, but you will have to plan for shipping/traveling.
3. You can post adds in the newspapers, post fliers, create your own website, etc., stating your info and that you are now selling geckos (sort of like "start your own business") and see if you can find many good buyers that way.
4. This last option is not a good one, and if you have to utilize it... its time to stop breeding. - You can find a decent shelter in your area and turn over the excess babies to them. Hopefully they will be able to find good homes for them. But like I said, if you ever have to do that, then you must stop breeding your geckos. Because at that point you are over-breeding and you are not planning ahead enough to actually care for the babies you helped bring into this world.
Good Luck