4 months old kittens

I have got 2 kittens they are sisters for £400 together as they are sisters and dont want them to be seprated lovely litter trained eat wet and dry food and baby kitten milk u can tske the bowls with you and some of thr cat food and litter tray and cat litter i got. I recently got them not microchipped as i just got them from my cousin who disowned them and i want to sell i dont know which breed they are