Pierrot, the guitareelectrique website is pure fiction and non-sense when it comes to market prices. I remember they mention second hands Joe satriani models JS3 JS4 or JS5 as selling around 1100 Euros used whereas these sell between $6000 and $10000 (and sometimes even beyond). This is absolutely NOT a reliable source.
I think $6,000-$10,000 is really sick.
$10,000 was just the asking price for a JS4:
http://64.233.183.104/search?q=cache:Pquw4yjbYIQJ:satrianiforum.com/ar/t2923.htm+Ibanez+JS4&hl=nl&ct=clnk&cd=1&gl=nl&client=firefox-aThe winning bid was $4,000.- and that's more than enough for a plank.
Ebay Item Number #7420461293So there is a lot of fiction and in many asking prices on eBay too.
The Argus list is not just BS.
It is a mix of some out-of-date prices, some updates of those, and some overgeneralisations like "all second hand Ibanez classical guitars are worth the same amount of money (for a long time they said they were all worth 180 euros > which was BS).
Now they say "All Andorra models of the 2800 range are worth 320 euros" > which still is BS.
And " All Andorra models from the GA series without a solid top (around 1988) are worth 280 euros and with a solid top 400 euros, with a few random exceptions that show that they don't know where these models stand in the total line of GA models. My opinion is that they know very little about acoustic guitars and in particular about classical guitars.
So the Argus list is a MIX of correct info and incorrect info.
THAT is the definition of UNRELIABLE.
If we knew that EVERYTHING is incorrect, we could just ignore it. But they're sometimes right.
So that's why we must compare it to other sources.
My opinion is that the list is improving, but there are several parts in it that are fossilized. The updates are always fragmentary and often overgeneralizing.
It is obvious that we need more than just one tool in the toolbox.

Ginger