Petromax 821 Baby Brass

Hi guys I have been trying to find out what a fair price for a brass petromax 821 Baby in brass ...would be ..

But cant find any on ebay ect ...

I found one on ebay - for sale 400$ ...!!

Can someone help .. to give an estimate what a 821 baby is worth ...

Its brass and good looking in working condition

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Thanks Karl

I will buy the 821er - i love the brass look and the proportions of this lamp - I have a newer brass 821/250 ..it burns so nice and quiet

Would you happend to know this optimus too - im not sure i have seen the model with green top before ...

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Thanks again