If you can wait, then play the waiting game. It is like fishing lor!
Was in the same situation as you. Viewed a EA and liked it very much. Asking was 650K. Asked agent for valuation and it was estimated @ 575K....which i was surprised, cos i've been looking for this area for the past 1 year and have been doing our homework. (we estimated valuation to be in the range of 480K) So you do the maths on the COV loh!