Export set ? You serious? Its global set, and its perfectly legal as it is still under $400, no need to declare custom duty or GST.
$25 more for a year warranty, compared to aliexpress 6 months warranty, then yes, but you have to understand this, buying from aliexpress is legal as its under $400, buying from local reseller may not be as it is labelled export set, which means no GST has been paid on it, and export set means they can not sell it locally, so, the choice is yours.
Looking at the sale at aliexpress, already 3000 sets have been ordered (8000 - 5000 yesterday), so, 3 more hours to go for those that want the sgd$266 note 5 4/64.
https://www.aliexpress.com/store/pr...418.html?spm=2114.12010608.0.0.44fb1e3aScJoHQ