If you have no experience mounting and setting up scopes on a rifle, do your self a favor and pay the $17.50. It will probably save you a lot if time on the range and frustration. Also if they mount it and bore sight the rifle and it is not done right, or they mounts come loose, you have some place to come back to and protest.

If you're experienced with scope mounting, and you're not one of those people that bugger up all the screws and then want someone else to fix that mess, go ahead and mount it yourself. I've mounted a lot of scope. Most times I never even bore sight other then look through the barrel and adjust the cross hairsa little. I surprise my self because, once on the range they are not really all that far off.

I like to start my scopes out at close range and get the powder and projectile problems worked out there, and then move back to the further distances to see what kind of groups they will shoot...

Good luck with your rifle.