In article ,
GE wrote:
I'm a new pilot looking for my first bird. I'm mostly looking at TAP,
Controller, and ASO. Whenever I find a plane that meets my needs, I am
finding a huge disparity in the values returned by AOPA's Vref and TAP's
NAAA evaluator. I have read in this newsgroup that Vref runs about 10% high,

I used both, I thought NAAA was better (more accurate, and more "stable"
across a range of models and options). Ultimately I think I was the
weakest link in the automated appraisal process. I was careful to add
in options I recognized and valued, but if I didn't know what it was or
what it was good for (eg aftermarket sun visors or fuel caps or speed
mods or whatever) I just ignored it. I'm sure the owner who paid for
those $400 sun visors didn't ignore them!

Plus in the end the engine time valuation was the weakest link on the
seller side. Many planes were priced without regard to run out engines.
Not many were priced without regard to near-0 time engines (since the
owner had just paid the bill!).

--
Ben Jackson

http://www.ben.com/