A quick search in lelong for newly completed unit that head straight into auction market.
Can see that majority owner got burnt from newly completed property gang is from the late 80s.

Here few example:
Silk Sky, owner born year 1984:
https://www.ngchanmau.com/pos/4188/pos_en?v=1529650908

Lakepark Residence, owner born year 1986:
https://www.ngchanmau.com/pos/4095/pos_en?v=1529651050

BTP 5, Acacia Park, owner born year 1989 & 1991:
https://www.ngchanmau.com/pos/4014/pos_en?v=1529651084

M Residence 2, owner born year 1986 & 1989:
https://www.ngchanmau.com/pos/3939/pos_en?v=1529650797