I can't see a For Sale section on here yet, so planting it here until shown otherwise.
I still haven't sold my as-new Barney pet cage. It's one of these: http://www.zooplus.co.uk/shop/small_pets/hutches_cages/hamster_cages/hamster_cages/189303
As reported on Mice Are Nice, it is HUGE, at 100 x 50 x 50 cm. Ideal for a large colony or for breeding where litters may be large. It's great for mice, gerbils, most larger hamsters and just possibly as a put-me-up for a young rat until it's old enough for a full-size setup.
New owner will need to improvise some carrying handles as the ones supplied broke upon fitting. The rest of it is solid. I've used and cleaned it only once and so selling it for £30 including carriage to anywhere on Mainland UK.
Please PM me if interested.
Ask not what your rodent can do for you...