One of my favorites and they maintain their value if cared for.
For collection purposes stay with a Belgian model.
Fixed sights, ring hammer and pouched models are preferred.
Portugal assembled models are less.
That '90s pistol is overpriced.
I see several at each show, buy and sell them regularly and have a few keepers stashed away in the safe.
Going rate for a nice one is $900- $1400 depending on specs and condition.