4k to 5k, you can get 0.4 ct already from wah chan.
0.3x ct is still below your budget.

then just get the cheapest one possible.
vs1 and vs2 - for untrained eye, probably you need magnifying glass to see the flaw.
si1 and si2 - sometimes it depends on your luck, check it properly first.

but the colour h and g is not really colourless.
recommend to get d,e,f only if you want to put into white gold.

if you do not care about the gia cert, you can go to those shops in sg wang to compare the price, sometimes they are cheaper.
just that the diamonds there you do not really know if they are using d or e or f due to no cert.

I think i can get slightly cheaper than the price you get.. do you need my help to check?

do you have wahchan member card?
and do you have any contacts in wahchan?

Wah Chan not that reliable for quality lo

If you got limited budget why you dont try wholesaler wo?

RM7k can get 0.5ct for GIA CERT!!!! Most important is LAB CERT not RETAIL CERT.

ALSO NICE DIAMOND must must have hearts and arrows and no fluroescent and make sure it is not OLD STONE- CHECK DATE!!!

They got so much more choices. Worth every bit of your money somemore best quality lo.

You can try ask for quotes for GIA Diamonds from Ms Khoo 0123272110. Her showroom in Plaza Mont Kiara

I just got a 0.5 ct f colour si2 3EX cut for 5.6k with GIA cert in midv wc

there are plenty of 0.4ct D - F colour SI1-SI2 ranging from 3k-4k

Which WC outlet u went to?