Damn fine deal, especially boxed and with shipping included.
the Dollar is weaker now - it was probably even more back then.
Your reasoning is backwards. A strong dollar buys more, so it would've cost less in US currency back then.
I'm unsure about the CGII's release date, but in late '92 the exchange rate was about 125 yen to the dollar. That would make it about $126, and if adjusted for inflation, it would be about $190 today.