I tried to make quick barter items price list but it didn't come out as neat as i thought. Hope it still helps some newer players with figuring out value of items. :
First Kappa!! : r/EscapefromTarkov
Buy DIY Kappa Case Decals no Case Inc Tarkov Online in India - Etsy
Essilor Kappa Edger Auction (0008-7033246) | Grays Australia