I have the Barney - it costs just under £50 (between £45 and £49 usually depending what price Zooplus has it on at). The base plastic isn't as thick as some cages, but it's ok - unless you have a hamster who chews plastic! I think you'd know if Dudley did that as he'd be doing it already. Looks like it's a good price at the moment at £44.99.
I don't know of any other 100cm cages that cost less than that. This is my set up for our Syrian (my cage came from somewhere else and has different coloured bars so it doesn't show up so well on photos!). It's exactly the same cage, just grey bars instead of black. The black are better really.
The two below are what it looked like a year or so ago when I had it set up for our last hammy.
Pip lives in an Alaska, and I think it is perfect, she likes it and it has lots of space, and can easily be adapted with a myriad of items just let your imagination go, Pip has a "skywalk" which is hamster tubes cable tied to the roof of the cage.
I must get round to posting a pic or video of her home since I gave it a facelift at the weekend..
__________________
RIP Forrest 05.03.2016
RIP Pippin 05.03.16-13.07.17 I won't forget you.. Ghost 14-07-17-13-05-19
"Some Angels don't have wings, they have little round furry bodies, four paws, a round nose, curious whiskers and unconditional love.."
I have a horrible chewer (chewed through plexiglass!) but I'd still recommend the Barney if you can get hold of it. Many hamsters will chew, but this can be fixed with a large enough cage along with plenty of stimulation and deep bedding. I'd definitely recommend it