Ah, cheers for the extra info. As far as a price goes, like I said a normal DJ would take around 2 hours to mix that many tracks, and if it's for a wedding I'm assuming you don't want the tracks too beatmixed into each other for the sake of people enjoying that song at that time. I know DJs that can beatmix well enough that they all become a mash; especially if they're mixing from 3 or more decks at the same time, but I'm guessing you really just want the songs to all play in a row, sounding fairly seamless without gaps of silence in between. 80 tracks is about 2-3 hours, and on top of that the DJ needs to own every track in your list, tracks are usually 2-3 dollars each. That's about $200 worth of music + the time it takes to book someone to create the mix at around 2-3 hours (an average DJ plays for about 100-150/hour). If you want the tracks to have a small amount of mixing into each other it could push out to around 4 hours. You might get someone responding shooting a proposal/deal at you for a certain amount. I'd do it for fuck all but I don't have all the songs.