Or the Tectake? It's really big! I think I'd want to see it first and make sure what kind of condition it's in. There's a similar one here
Goldie hamster cage - gerbil cage, hamster house, wooden hamster cage - brown
If you get one like that it would be a good idea to get a roll of sandpaper as well as waterproofing paint. To make sure there are no splinters. For a robo I'd probably leave the top shelf out as well or they could fall from a height (at the edges of the shelf).