The modern HW50MII has been available quite cheaply over here earlier.
Yes, the trigger isnt up to the "Rekord-standard" but for the price, you get a really nice gun.
I remember when the HW50s was sold at about 2800 Norwegian kr, and the HW50MII was sold at about 1700 Nkr. A Gamo was somewhere in between!
So the cheapest gun of the three would be a HW50MII.. and the "Perfekt" trigger is quite acceptable for most hobby shooters.
It really was a good deal, and if you can get one at a comparable price to what these were priced at here in Norway, I'd go for it!