I don't know exchange, but I know sell. A guy min the big villa in undella town buys relic items, and a guy in the iccuris Pokemon center will buy shards.
It contains the element plate items, as well as Relic items, which can be sold to the relic maniac in the Undella mansion. The item at the bottom is the Relic Crown, the most expensive.
You find items that can be sold to a collector in Lacunosa Town.
relic castle
there are ancient items that you can sell to the billionaire in the west room ,large villa in Undella town. ancient item list: relic band $... , relic copper $... ,relic crown $..., relic gold $1000, relic silver $500, relic statue $... ,relic vase $..., ... means don't know. ( i think relic copper is $100.
It can be found in the Relic Castle in Pokemon Black Or White
Relic Castle in the desert
Volcarona is inside Relic Castle.
you have to get to the bottom
Relic castle
It's west of Desert Resort
one is in the relic castle on route 18
You can get it in the following places: Relic Castle, Nimbasa City, Black City, and in caves(random items)... one in inside of relic castle, and in Nimbasa City, from a man in the building north of the Pokémon Center... that's all I know for now