@Sam
You can buy showcase items from the store below the normal Attack and defensive items (for strength and itelligence).
Volleying is when two or more people hire someone rapidly. Everyone benefits at some point. The person that keeps gets the bonuses from the tutor until they sell it in which would provide them same bonus as the person who did not keep. The person being volleyed makes a certain amount each time they are hired which eventually caps at 1,000,000 (1m).