[ren]

Could someone tell me where the used guitar shops are in Hong Kong?

[neither3nor4]

What sort of guitar? If it's a classical you are after, you could try http://www.proguitar.com.hk/main.htm

As far as I can tell, online is the place to find second hand guitars in Hong Kong. You could ask here;
http://www.hkcampus.net/webforum/list.php?num=47

Some music stores carry some second hand items. I've seen some used guitars in Tsang Fook and Harmony Music. It wouldn't be worth the journey just to look. I'd call first.
http://www.tsangfook.com.hk/tsangfook/contactus.asp
http://www.harmonymusic.com.hk/subpages/contract.html

I imagine there are plenty of little stores hidden away in commercial centres. It's a matter of finding them though.

[G-Lo]

There are a bunch of guys running a webshop called Mae Guitars
www.maeguitars.com

[hullexile]

A friend's daughter (14) wants to learn to play the guitar and her birthday is approaching so I may be looking for a second hand acoustic. Any idea of what sort of price these would be (just a rough guess would do)? Anyone got one for sale!