請推介數隻 $250 之內的男裝手錶 ( 要提供地址和能以較平價錢買得的地方 )

Are you sure the AW-81 model range is within your $250 budget? It looks decent and feature-packed, but where are you going to purchase it?
Bear in mind that if you get it in some independent stores in Mong Kok, the sales staff won't let you keep the warranty card, which you are supposed to be able to. This is why the prices can be kept low.
For more information on the AW-81 series check this link
http://www.javys.com/casio/new_web/watch/new_watch.php?id=AW-81D-1AV
If in doubt, always download the PDF manual and see for yourself.
http://ftp.casio.co.jp/pub/world_manual/wat/en/qw2747.pdf