Hope you have better luck with that plan than I did. I found the grip too small for my thin hands and long fingers. Despite weeks of practice in front of a mirror, I couldn't draw from a holster and have the gun settled in my hand, ready to fire, and pointing the same way twice. The Sig 365 gives me the same feeling.
I was gutted, because it shot great at the range using +P ammo with an uprated recoil spring. The all steel construction soaks up recoil really well for such a small gun. The original recoil spring was bad, even 115 gr basic range fodder was tossing the empties into the next zipcode.
Does the safety work properly on your example. Star safeties on the Firestar, Model B, Super B, and BM are renowned for wearing such that the hammer has to be pulled back a touch to engage the safety. I forget if it is part of the hammer that wears or another component.
BTW, if you go and handle a S&W CSX, you will find it almost identical in size to the Firestar, but with a better grip shape, at least for me.
ETA: Great price, how many mags came with it? I have a bunch of Stars, from the 32 ACP Model SI to the Megastar in 45 ACP.