Electric guitar...

I paid $500 for a Strat in 1989 it was alot of money back then so I know how you felt about $400 in 1990. I still have the guitar a Fender Japan Contemporary Standard Stratocaster in black. Amazingly enough its still worth $500 all day in todays money but I'd guess the buying power of $500 in 1989 is about $1500 now so...

My model 2 has held it's value, too.

It was $500 new in 1987 (an 86 model), and is worth about that now.
Those first gen MIJ Charvels were and still are nice.