sounds about right. balance that cost against new drums in that pattern and the discs you eventually want. these are the fun types of judgement calls.
CIP1 has 10% off everything for the next 5 days. you may want to consider whether or not you should just pick up new ones. just depends what kind of condition yours are in. i would just save for the discs personally. waiting to put the Fuch's on can be good modivation to save.