DIY publishing in Vietnam

I have just discovered that I can get print-ready PDF files published in book form on single-book digital file basis here in Vietnam!

I researched self-publishing for the children's book I finished, and the lowest quotes came in at almost $2000. I can do the same job here for a fraction of that - the only difference being the lack of an ISBN number. How important is that? Well, for my purposes (a few sales to people I know and then review copies and carrots for a real publishing contract) this will do more than adequately. I'm quite excited - not least because I have three other children's book ready to go once I have sorted out illustrations.

Let's not get too carried away - this is Vietnam and I've only had email contact so far. Samples and definitive quotes to come next week...