How much you bought it? From?

That's like almost double my 122, the 220 is bookshelf 6.5in woofer right?

From my experience, the Diamond 220 can sound a bit bright and unnatural (not to the degree of sibilant) if pairs with transparent amp, you should be better with amp like Marantz, though it's not detailed and clear enough, and not full blown dynamic enough too, higher grade like PM8005 I'm not sure

Until now I keep thinking about the Wharfedale pricing in Malaysia. Why is it too expensive?

Diamond 9.1 was tested at £150 during WHF review in 2004, and it was reasonably priced at RM950+/- locally.
Reasonable price considering currency conversion at that time.

Now Diamond 220 which is tested at £180 in 2015, should be priced not more than RM1,200 locally.
Why selling them at RM1,900 which is nearly 2,000?

Dali Zensor 1 tested at £200, I found a website in Malaysia selling for RM695.
Dali Zensor 3 tested at £300, selling for RM975..