$50.00 is a good value for a Colt, so if you get it for $40.00 you are OK. Ben Pearson bows area about the most underated bows out there. Most do not carry a big collectors value, but they are solid shooters if in good condition. They are great beginenr bows, and the Colt is one I always recommend to new shooters.
Most are target weight with white limbs, but there are some out there in Hunting Weights with brown limbs. I have a 50# and a 55#. Both solid.
Grab it you won't get hurt when it comes time to sell it if it is in good solid shape.
Like HORNEY TOAD said. The quiver and the arrows are worth the $40.00. Actually, the quiver has more colelctors value than the bow.