A while back, Starhub had a MaxOnline promotion for the MPX200. Heh.. Got mine at $257 + $100 BenQ voucher. Nice phone but uses Windows Mobile 2002. I've heard that the firmware upgrade to Windows Mobile 2003 is in and you can get the phone upgraded at Motorola Service Centre.
For the phone, you can try 2nd hand. I saw one piece in a shop in Queensway Shopping Centre. It was going for about $200, I believe. Cosmetics was good. Try your luck there. Test the phone out yadda yadda.. A steal at that price considering that most shops with old stock for the MPx200 sell it at about $800++ with contract.