because the TT price can vary... for example.. say we have a gun... if at full TT value it is 100peds and john wants to buy it at tt+100 the total rpice would be 200ped... but if the items was greatly used and tt value was 3ped then john would have to pay 103ped... and he would then spend 97ped repairing the item to full tt value himself.
understand?
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