Thank you for the link. It's really much cheaper, sights to see ranging from $17-20. Able to find the rarer set in japan? Like the space shuttle, Buddha etc
that's the official website for nanoblocks. of course it would be cheaper, it's the default recommended retail price (RRP)
You might find certain outlets (i.e. BIC Camera) that sells stuff slightly cheaper even. (100-200yen cheaper)
Sets are rare mainly because they are out of production.
You'll have a much higher chance finding rare sets in places that do sell Nanoblocks but low demand, than in Japan. (i.e. Taiwan/HK) as they might still have stocks from a few years ago.