I wouldn't advise getting it unless you can get it dead cheap.
I had an opportunity to go up to this thing in person, and its made of a very cheap, light-weight plastic/resin or something. I think its hollow as well. You can hold it up easily in one hand - it has next to no weight.
Paying £150 for this is set is not worth it, as you are essentially paying about £120 for the Predator bust - which is utter rubbish. If you can get it for £50, then perhaps it'd be worth it.