Check to make sure it has the new style firing pin. If it hasn't been changed out, I'd ask for a discount. When smiths installed the new firing pin, they were susposed to stamp the inside top of the receiver to verify that it had been done, but the only surefire way to really know is to have the gunshop verify that it's been done or have them take it apart in front of you....
The new pin looks like this:The oldstyle (recalled) pin looks like this:
Here's a schematic to help you, if you think you want to change one out yourself:
If you load for it, you'll want to keeps the loads on the light side. Mine liked 45 gr's. of RE15 with 150gr. pills.... The win 100 is a good little rifle but needs to be kept clean to insure proper function. The triggers aren't very good and there isn't much you can do about them. If you properly bed them, they can be great shooters. Light recoil and fun to shoot. That's about all I can think of. Good luck with your search...