I am still at the moment searching for a twin stroller (and at the same time hopping to get rid of my single stroller).
Coincidently at the MJ Forum, there is a mum who wanted to give away her Kohler twin stroller, just for free!!! Yippee!!!!!
It is an umbrella stroller therefore the stroller can only cater babies from 6 months onward. Therefore we are still considering to buy a twin stroller, either 2nd hand or a brand new one (if it is not too expensive).