The only NEW polaroid cameras around are from Fuji, e.g. the Fuji Instax mini which uses "water-proof"/"water-resistant" credit size polaroid films with a plastic protection layer on it. Of course other than this model, Fuji has the wide instax and some others.
The Polaroid company has ceased but is being revived. Check this out:
http://shop.the-impossible-project.com/shop/film
In Singapore, here is one site which sells them:
http://madecineshop.com/ (these are USED polaroid cameras)
In clubsnap, you find all the bargains here:
http://www.clubsnap.com/forums/search.php?searchid=12870949
ALL polaroid cameras are "reloadable". You need to buy polaroid films to put in and shoot to produce polaroids.
Of course, if you know eBay, the cheapest bargains are usually in there, but contains some risks.
Polaroid cameras are usually inexpensive, BUT the films are Expensive! The type of polaroid camera you choose determine the type/s of polaroid films it uses, and thus determine your "future investment" in shooting polaroids. The most expensive polaroid films today are the ones which has stopped production, the same ones being re-introduced in
http://shop.the-impossible-project.com/shop/film
If you can buy in KL, there are a few shops in KL which sells them, and they are generally cheaper than Singapore.
Good Luck.