Buy 25 piece of 10g, easy for you to sell I guess 

Seems like a buried treasure later. The best place to bury the gold?

I only buy 1 oz stuff unless U super rich then buy 10oz or kilobar.
For small change, you can get 1/10 oz , however the premium is 10% more.
if that the case better get silver lor.

Large bar disposal to general public may be difficult unless U willing to sell back lower to banks or goldsmith
According to pricing, there is not much differences between 1 oz bar and 1 kilo bar.
So stick with 1 oz bar/coin.
it's is your RM10,000 notes in the future.

For RM10 notes, RM100 notes that one you have to buy silver lah.
Cheapest branded gold bulllion is PAMP and credit sussie 1 oz bar but
actual price will depend on MKS distributor how much they 1 2 sell to you.
U 1 2 bury in 1 place or 10 different place.
I choose 10 different place as i 1 2 hedge my bet.

I know spread means difference in sell and buy.

My question is, what happens when want to sell back to them later.
This spread will apply too?
Will it be reflect in black and white when we purchase the gold coin?