Biking and Bikes in Antwerp

Hi!

I'm thinking of buying a bike for a few months ( I'm only in Antwerp till November) - so I'm checking out what the options are for both second hand bikes and also, weekend/ day routes for riding to close by areas around Antwerp.

I was wondering if anyone knows how to get started looking for second hand bikes? And if you've done any nice biking routes outside the city?

Thanks,
Jasmer