They do not keep their value, you could pick up a used one for about $250 to $300. Expensive and hard to find aftermarket magazines for them. The scope mount is not worth a darn and you need special rings to mount anything. Their accuracy is poor to non-existant and if you want to hit anything make sure they or it is close (50 yards or less). At one time they were the poor man's AR, but their prices have gone up and AR prices have come down.
Overall it is a poor investment. And nobody will argue with that.
Si vis pacem, para bellum