need help with 1549 Brandenburg-fraconia Taler

a friend of mine says she might be willing to part with this coin. what would be a good, honest offer for this? she thinks she paid over $300 about 12 years ago. i really like this and hope it will be mine soon. sorry for scan quality.



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For comparison, I just picked up this one on ebay last week for roughyl $300 with shipping and it is a 1543 Brandenburg-Franconia taler in the same exact grade.
1543 taler (ebay)
But isn't $300 Canucki dollars worth about $10,000 in US money now?
World Collection
British Collection
German States Collection
I am still struck by the oddity that a circulated taler that is almost 450 years old has close to no appreciation in 12 years (assuming the original post was correct). I checked Krause to make sure and price is in the ballpark. Krause has it slightly higher, but I recall NEN selling a similar piece in the $325 range a while back so I think Krause is high. I was thrilled to pick up a problem free piece at that price.........