I bought my Scooba at a very cheap price from a US site called www.woot.com. This site has one item per day deals so you will need to be very patient, checking back daily. They will occasionally have Scooba/Roomba on sale. You will need to use a US address though; eg. shipped to a friend or use a Borderlinx account. I don't think they ship internationally. A bit of a hassle but a Scooba can be yours at only USD$99; RM350. Note that you may get the refurbished set and it's the older model 5900/5800.

And regarding the cleaning solution, it's a bummer that we can't get a Scooba cleaning solution here. I find the solution really effective and cleans dirty floors very well! I tried Kiwi Kleen (blue one) and still find it foamy. The vacuum filter traps moisture, indicating the solution is still foamy.