I'm VERY new to the whole archery/crossbow thing. I walked into the local liquidation store yesterday and saw a Horton Brotherhood crossbow NIB for 150 bucks. The store usually is about 50% off full retail so I picked it up. The only thing wrong with it was it was missing the normally included red dot sight and the box was a little banged up. Is this a good crossbow? Are there any issues or maintenance do's or dont's I should be aware of?