Ask Andy Chernak or Ray Rubin from Grenadier (via industry contacts)?
They were running that promo.
otoh... that doesn't look like the (simpler) gold-plated wizard they gave me at the time.
"In 1982 and 1983 Grenadier conducted a Wizard's Gold Contest in which they placed gold-plated castings within random boxes of figures. The box also included a certificate for a drawing. The grand prize for 1982 was a one-half ounce of gold for the purchaser of the box set and the store which sold it. The 1983 certificates awarded gift certificates and were placed in 6001 - Dragons of the Emerald Idol and 6002 - Skeleton-Raiders of the Undead box sets. However,
collectors have reported gold-plated figures from other contemporaneous sets."*
and the seller says this was in a non-Grenadier assortment. And the bottom doesn't seem to have validation (can't tell). And the seller doesn't say what's on the bottom.
Too risky for that price,
imho.
* from
http://en.wikipedia.org/wiki/Grenadier_Models_Inc.