Please advise the true worth of MBA degree -an online programme
offered by Universitas 21 Global. Their head office is located in
Singapore. Their address is
5, Shenton Way, #01-01, UIC Building, S'pore 068808; www.u21global.com.

I am being offered an MBA programme and the cost is USD5500/-. I would
like to know the international standing of the degree and if it is
value for money.

In their FAQ :-

http://www.u21global.com/cgi-bin/corp.dll/portal/ep/programView.do?programId=32978&channelId=-16973#f08

Will employers recognise my qualification?
Employers already recognise the quality of the Universitas 21 Global
Online MBA Program. A number of corporations and government agencies
such as Satyam Computer Services in India, Keppel Corporation,
Hewlett-Packard, HDB Corporation and Exxon Mobil in Singapore sponsor
their employees to study at Universitas 21 Global. You can be sure
your qualifications will be recognised by discerning employers.

+++

Which rather makes me suspect that non-discerning employers will
regard the certificate as a bit of toilet paper. Or am I too cynical ?

I think the real test is to pick one of the established universities
that they claim to be associated with, and bluntly ask them whether
they recognize an MBA from U21global Pte Ltd  5, Shenton Way 
Singapore.

This bunch seem to be the 'validators' - shame their site does not come up:
http://www.universitas21.bham.ac.uk/u21pedagogica.htm

( Looks like Birmingham University UK Server - but ... )

Accreditation by U21pedagogica
U21pedagogica Ltd is the wholly-owned quality assurance subsidiary of
Universitas 21, a network of major research universities in nine
countries. U21pedagogica was initially established to provide quality
assurance to Universitas 21 Global, a joint education venture of
Universitas 21 and the Thomson Learning.

Also:
U21pedagogica is registered in Guernsey, the Channel Islands, with an
office in Charlottesville, VA, USA.

I would do a lot more research before parting with one red cent.