Yes, they will probably all be going back to the store. Next week I am planning on taking the original babies to the store. Next week will be two weeks that we've had them and they having been eating/drinking on their own since we've had them and they and have grown a lot. I wish I knew their actual age.
I've considered keeping 1-2 females as pets, because they are all so cute! But I will be moving into a smaller house this summer and I think 3 gerbils and 5 dogs will be a lot already. Plus it always leaves me open to take care of any more pregnant animals we get at the store.