How much ?
 

How much for the following items ?

1) Silver Ring of Knowledge (int +5) ?
2) Baby Bat License ?
3) Magic Boots [+3] (Df 6[+3], M.def: 8, Evasion: 8, Cass: Mage lvl 14+)
4) Archer Skeleton License ?

Thanks in advance.

In NPC, you can buy baby bats license for 1 silver, so probably lower than one silver if you vend. I think I sold mine for 500c last night. You can try for more~