I just pulled this...

a +1 longsword of backstabbing +5, which gives you +5 to hit/+8 dmg.

Quite frankly, I don't have a clue as to its value, so I thought I would put it up here and get people's opinions and offers. I don't know yet what I want to do with it, but it seems like a pretty situationally useful weapon to me.

Can someone fill me in on its worth?

TIA.