I think the money is perfectly reasonable - very good in fact. But it sounds like you're effectively advertising for a DBA-focused member of an IT systems team - rather than an out and out DBA guru. Although I'm sure there must be some SIMS gurus out there who are fed up with having to do the other tasks in IT admin and would prefer to focus on SIMS support. Alternatively it sounds like a great job for an outstanding Computer science graduate - they all will have covered RDBMS theory and used Oracle or MySQL in their projects/assignments and it wouldn't take them long to get up to speed with SIMS - so long as you pony up for some training.
An interesting take on it. I never thought of it that way...
Training is negotiable, I know there won't be many SIMS admins about so someone with a good general knowledge of education and IT who can show an aptitiude to learning quickly could do well..
Regards
Mart