xiaoman1 

I am not familiar enough with the brand to give you a valuation others will chime in, but will comment on the condition and service.
The bike seems to need a complete service as well as consumables (chain, cables etc etc.) The paint needs a good cleaning and I am not sure that a good polish will remove the rust in an appreciable way.....if you like patina it is a great starting point, if not and you want it to look like the picture it will be a costly undertaking.
In terms of the service and tools if you are capable to do the work yourself the tools will not set you back much, however, if you need to have a shop do all of the work figure 100.00 to 200.00 labor to clean and service less the parts needed.
In this condition is it worth 900 to 1100.00 to you?
GLWTB, Ben