Best bin cage and tips on buying?

[Jellybaby24]

I have decided to finally separate my robos, as I am worried for their health and happiness if they continue fighting. I probably should have realised separating would be best earlier, but better late that never! After all, their health and happiness is and has to be my priority. I would've put one of them in their old cage, but it is far too small and wouldn't be fair, so I've decided to go for one of the cheapest options: a bin cage. I know this requires minimum diy, is good quality and a very good price. For those of you with bin cages, which ones would you recommend and do you have any tips on buying and keeping bin cages?

Thanks, Jellybaby24 xx