RuneScape Wiki
This is a static calculator.
It does not take user inputs, but it does use changing prices from the Grand Exchange Market Watch. If prices appear to be outdated, purge the page by clicking here.

This calculates the profit/loss of paying Thormac to change a battlestaff into a mystic staff. It normally costs 40,000 per conversion, but this is reduced to 27,000 when wearing a Seer's headband 3.

Battlestaff Battlestaff
staff cost
(no headband)
Air Air battlestaff.png8,114 Mystic air staff.png24,179 -23,935 -10,935
Water Water battlestaff.png7,974 Mystic water staff.png23,871 -24,103 -11,103
Earth Earth battlestaff.png8,028 Mystic earth staff.png24,346 -23,682 -10,682
Fire Fire battlestaff.png8,011 Mystic fire staff.png24,235 -23,776 -10,776
Lava Lava battlestaff.png9,062 Mystic lava staff.png48,123 -939 12,061
Mud Mud battlestaff.png15,757 Mystic mud staff.png57,710 1,953 14,953
Steam Steam battlestaff.png12,443 Mystic steam staff.png55,073 2,630 15,630
*Note: You can buy up to 1000 battlestaffs of a given type every 4 hours in the Grand Exchange.

Warning: do NOT expect any of these to be profitable. They normally sell for well below the GE asking price.