No, the sign was at Round Top Texas about a year and a half ago.
I tried to get the guy down to $400 but he wouldn't budge.
I'm just not sure what you mean by a good appraisal. The barber pole/sign collector community is rather small so prices aren't as cut & dry as they are in the petroliana field.
I will pay much more for something I don't have than I would if I was just upgrading or getting it as a trader, so even my own values fluctuate greatly. My collector friends are the same.
The 5' sign I was talking about was about an 8.5 and didn't sell at $600 for 3 weeks, I would have paid $400 max, so in my opinion the value is somewhere in there.