Expiramental A/C value for local/state taxes.

[an8pilot]

I have been using AOPA's Vref over the years to get a value for my certificated airplane. But what have others used to substantiate a value to your local tax man?

I guess I could put the value of the purchase that is listed on the bill of sale for my new to me Skybolt.
Which is provable in purchase documents and wire transfer.

 

[Tomcat]

 

[bf92]

 

[an8pilot]