There is a standard scale for valuation:
1/4  % on the first RM100,000

1/5  % on the residue up to RM2 million

1/6  % on the residue up to RM7 million

1/8  % on the residue up to RM15 million

1/10 % on the residue up to RM50 million

1/25 % on the residue over RM50 million

Minimum Fee : As above, but may be subject to a maximum discount of 30% and a minimum fee of RM300 per case.

source:  http://www.colliers.com.my/services/value_guide.htm
You should negotiate with the valuer.... if the house is in Klang Valley (i.e the valuer does not have to incur much travelling cost for their visit to the house),  and the house value is around the range of RM 250K-RM300k,  there are valuers  who just charge the minimum of RM 300