Quick help on buying miles
 

I have about 38K Asia miles. I was trying to redeem it for a ticket from BLR to SFO. Totally 66K miles are required for this leg and it wasn't available for my dates.
So I tried redeeming it for HKG to SFO, surprisingly there is availability. The miles required is 48K.
Should I just buy miles from the Cathay website (10K miles@300USD) or buy the miles from other websites like sellmyrewards.
Can I ask any friends to transfer miles or book for me? Does it work instantly or take 2-3 days.

I tried topping up my miles on Cathay and transferring it from my family members before - truth be told, I find it rather expensive both ways. If you can find the miles on other websites for a lower price, I suggest doing that instead :)

Buying miles from cathaypacific.com means you get them instantly. Same with transferring miles. Not sure about the other methods.

P.S. sellmymiles does not appear to be a Asia Miles partner. Only points.com seems to be.

How are you getting from BLR to HKG? If you have to buy a ticket, and adding that to using $ to buy the additional miles, wouldn't it all be cheaper and less hassle if you're to just purchase your ticket in the first place?

Yes, I am paying for the BLR-HKG trip.
The math works in my favor even though I pay for the HKG trip.

The BLR-HKG trip is about USD400. The HKG-SFO (EP seat) after purchasing miles will cost USD350. So total around 750$.
This is still cheaper than paying for BLR-SFO, which is about $1200-1800 on Cx.
On other airlines, the cheapest I found was $1100.

If I transfer using points.com, is the transfer instant ?