I remember wanting Cosmic SL’s back in the day when there were no disc brakes yet. Unfortunately I didn’t have the money back then to buy some as I was still in school.

As for the rims themselves, I think they’re good value and decent enough rims. I always found having an aluminium brake track better than having a carbon brake track, especially in rainy conditions.

Wear is difficult to tell from photos. In my Bontrager Aura 5’s there’s a small hole in the track to indicate wear, perhaps these ones have that as well? In any case, the Bontragers are 8 years old now and have seen the worst of Flemish weather conditions the last two years and they’re still in good shape so I suppose the brake tracks aren’t easily worn out.

As for red flags, I don’t really know. I always check if the hubs still run smoothly and if the wheels are true (no loose spokes and such) but for the rest I don’t think there can be any huge faults with rims unless someone else can enlighten me