1.Nether rack2.Nether wart3.Nether fence4.Pillar Quartz5.Chiseled Quartz6.Quartz7.Brick Blocks8.Brick Stairs9.Chorus Flower10.Purpur Blocks11.Purpur Stairs12.Purpur Slab13.Smooth Sandstone14.Sandstone slab15.End stone slab16.End stone Bricks17.Prismarine Crystals18.Sea Latern19.Prismarine Shard20.Ice21.Packed Ice22.Glow stone (Not dust)23.Spawn Villager Egg24.Spawn Pig Egg25.Chiseled red sandstone26.Smooth red sandstone27.Red sandstone stairs28.Double red sandstone slab29.Putter fish30.Golden carrot31.Golden apple32.Chorus fruit33.Rabbit hide34.Blaze rods35.Shiny arrow36.Ghast tear37.Vines38.Beetroot seeds39.Clay40.Clay block41.Dispenser42.Note block43.Powered rail44.Detector rail ( Average Price Please! )
do you mean normal slabs? pretty sure these don't exist :/ edit: and sorry, i don't really know a lot about these items i do know the beetroot seeds are almost worth nothing