I was given a gun years ago before I knew much about handguns and accessories. Now years later I dont like the set up and want a modernized 1911. The slide was drilled and tapped for a BoMar sight rail which I believe was used for bullseye matches…. So now Ive got a slide that isnt cut for novaks, and a DIY stippling job on the front strap. How much value is depreciated or what is it worth? (I can get a new slide and send it all off and have it customized but that cost adds up quick vs attempting to sell to someone who wants a project gun, saving a little, and buying a SA or R1 etc.,)