90-120 can find quite a decent range.
Uniqlo is cheap and good. Decent all rounder.
Zara maybe can try, though it will be a little in the pricy range.
H&M and cotton on I will avoid for a casual blazer as I think the quality CMI.
And they usually come in trendy designs suited for the younger crowd.
Sometimes take a look at departmental stores like OG or BHG, their items are slightly pricy, but sometimes they have really good deals below $100 when on sale.
Lazada and those online ones I never tried, these type of thing must physically try on the sizing.
G2000 is the best in this price range.
Go Changi City Point outlet used to have those odd jackets ala carte on sale at $80-$100.
But now I don't see them at this price anymore.
G2000 prices getting ridiculous. And not much sale nowadays.
At current G2000 prices, there is no longer a reason to go to G2000, there are much more options at their current prices.