BUDGET RANGE: < RM500

Brand Preference if any: HTC (but any other suggestions welcome)
Second hand: Yes

maximum how long ago released: Anytime
QWERTY keyboard: Either

Keypad: Anything

GPS: Yes

Bluetooth: Yes

WIfi: Yes

Frequent Overseas traveller to Japan and US? or other countries: No

Camera Resolution minimum: Anything

Expandable Memory: Yes

3G : Don't care

HSDPA or higher: Yes

Front Camera: Don't care

Gaming Type: No

Screen Resolution: Don't care

EXTRA NOTE: My husband needs a PDA phone for his work. He isn't the best phone owner so we are looking for something second hand and cheap so scratches aren't a major disaster. His main priorities are GPS, Good enough storage for quite a few contacts (preferably with extra details such as address, multiple numbers etc) and hopefully office mobile.
We are both familiar with HTC so it is a preferred brand but would consider any of the main brands which fall within the budget.

Thanks in advance for your advice