I own 1. It was suppose to be a transition bike to a larger capacity while taking my L but it grew on me.

FZ is more than ok and parts availability is great. Just have to be careful, shopee you can find everything you need and there some famous shops and mechanics that still servicing it. Fuel consumption is very good. The down side is that this damn bike is highly modifiable and affordable too.

Once you stabilize it i.e. change those wear and tear parts it works fantastically. It is a very enjoyable bike. I get like 400+km on a full tank (12L) if you ride at a reasonable speed. Put in HDEO and it smooth all the way.

Just be prepare a few thousand for spare parts(you can change when it is needed) and possible overhaul (~RM2k) situations, you be fine.

Make sure you check oil levels. I do a 1k change of oil + filter so I do not have worry about it.

As some units makan minyak. Top overhaul (~RM600) if you want to avoid that.

FZ150i is inherently noise due to sometime loose clutch casing and at times the top head setup. I will recommend that you check and search FB for groups and find a decent mechanic that is near you before/after you get the bike for a check up prior to using it daily. 

Personal sellers ranges from 2 to 5k depending on the year and condition.

Take the FZ, Anita Yusof (google her) already went around the world with that bike..

Do you intend to upgrade to bigger bikes later down the line?

If yes, Used NS200/Duke 200
If not, FZ150 can be your end game bike.

Spare parts for all 3 bikes can be easily found, considering the FZ's popularity most places would still have stockpiles of spare parts.

If you do not mind thief magnet, early LC135 can consider also

One thing you need to be aware is that at this price range, you're not getting ABS.