I think you should go for a used Brompton.
+2
Now as to how to locate one at a decent price. I looked into this last year before settling on something else. Here are the steps you need to take.
- Make friends with someone from the UK either here or on another forum. I already had a bunch so this was the easy step for me
- Look here, http://www.gumtree.com/for_sale/leis.../brompton_bike
- Be careful of a really low price, some are scams,some are stolen
- send your buddy money, have him purchase it and ship it to you.
- Still cheaper than a used US Brommie.
BTW I didn't follow through with this, but passed it along to a buddy else where, he paid U.S. $500 plus $150 for shipping etc for a used M style brommie.