Replying to Help with ski Purchase

theres this little ski swap sort of thing around my area that starts tomorrow, since my dad helps set up the whole thing, him and several others get first choice on everything. right now i have the line stepups but they are pretty fucking trashed. I could either persevere with those for this upcoming season or buy a pair of moderate condition ar6's for $150. The last option is that i could buy these almost brand new k2 public enemys for $70...idk which option to choose, so it would be awesome if you guys could help me out, if you guys have any other ideas that would be appreciated too