Hi Fourdogs, welcome to talkbass!
First of all, I know nothing about this 'Hamburg Vienna' bass, but I do remember what it's like to be in desperate need of a double bass.
My advice: Slow down there pardner! There is a 99% certainty that any $800 dollar unknown bass will be a big disappointment. You have read the stickies at the top of the forum, haven't you?
If you are still keen, have your teacher or an experienced player check the bass out. If you do not play DB, every bass will sound good to you.
There is a Vienna Hamburg bass on ebay
here. If this is the bass, I would not bother.