Go check what's available new in your area first. We have them here in our local Lowe's hardware stores, target, etc.
Don't know what it's like on the Islands, but I got my Haier 20 bottle for around $150.00 at Lowes on sale about four years ago.
Seems like you might be able to get a little bigger for not much more money, plus you would be the only one to have ever used.