I searched a couple scripts where you get Shop points at a certain level here is the script that i have in my creaturescripts/scripts/points.lua.
local t, storage = {
{30, 30},
{190, 30},
{220, 30},
{250, 30},
{280, 30},
{300, 30},
{315, 30},
{330, 30}
}, 256
function onAdvance(cid, skill...