Let me quote a few
DP = developer's price TP= Transacted price

Bdr Kinrara (Sentosa) (Link) - 462K (DP 2009) - 750K (TP 2011)= 62% (2 yrs)
Bdr Kinrara (Permai) (Link) - 380K (DP 2008) - 780K (TP 2011) = 105% (3 yrs)
Taman Esplanad (2 1/2 superlink) - 438K (DP 2002) - 1.1 mil (TP 2011) = 151% (9 yrs)
Temasya Glemarie (Superlink) - 750K (DP 2009) - 1.36 mil (TP 2011) = 81.3% (2 yrs)
DPC Adiva (link) - 460K (DP 2003) - 1.40 mil (TP 2010) = 204% (7 yrs)
Bukit Rimau (SD) - 720K (DP 2008) - 1.35 mil (TP 2011) = 87.5% (3 yrs)

E&O Sri Tanjung (Penang), anyone know?

well said... AMINT (experienced investor)

1) Buying 4 cheap units would also used up the person's quota of 90% LTV (1st 2 properties) loan entitlement (for new investors).
2) My lawyers would prefer to give me 50% or maybe 70% discount on legal fees for 1unit X SPA+FA and may not agreed to give me the same discounts for 4units X SPA+FA (to much paper work for the same income/legal fees).
3) It's easier to say TODAY to buy 4 units of Tropics (Nov 2012 - after the price shot-up), but the sales of Tropics was very slowwwww during its initial launch. Only at a later stage the sales improves. At the initial point during launch, does anyone dares to buy 4 units under the same projects (high risks)... during that launched year? Only handful are gung-Ho but very rare.
4) OK ... lets stop here...

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Added on November 14, 2012, 1:26 am

well said... AMINT (experienced investor)

1) Buying 4 cheap units would also used up the person's quota of 90% LTV (1st 2 properties) loan entitlement (for new investors).
2) My lawyers would prefer to give me 50% or maybe 70% discount on legal fees for 1unit X SPA+FA and may not agreed to give me the same discounts for 4units X SPA+FA (to much paper work for the same income/legal fees).
3) It's easier to say TODAY to buy 4 units of Tropics (Nov 2012 - after the price shot-up), but the sales of Tropics was very slowwwww during its initial launch. Only at a later stage the sales improves. At the initial point during launch, does anyone dares to buy 4 units under the same projects (high risks)... during that launched year? Only handful are gung-Ho but very rare.
4) OK ... lets stop here...