That's a lovely set, and the Mahogany Premiers are harder to find, too. I have a Premier from that era, but the wrap was stripped off an there were mods, so it was devalued quite a bit. It was a pretty standard set for the time too - this is much rarer. I know Premier stuff is rarer in the US, but even so, I think what you are suggesting would be a fair price. I've seen Premiers similar to that one up on ebay over here for £500-£600.