I'm a simple, working class lad so I always think a bigger robot=more expensive.
This fella isn't that big (55cm tall) but I've used some lovely bits from the 1950's to build him and he actually took me ages to build. The legs were particularly difficult to attach, with lots of head scratching involved 😉.
If he's a present then I'll happily write you a bespoke backstory for him if you email me some details about the recipient. If not then you'll just get a story from the deepest depths of my twisted mind.