I would need a little information before I can answer that one.

When is the event?
Where is the event going to be?
How long do you need me to play?

The following does not affect the price, it just lets me know how to prepair.

What type of event is it? i.e. Wedding, Party, Concert, Living History event, etc.
If this a living history event what time period?
If not a living history event do I need to wear period clothes or just dress nice?

If you can e-mail me with that info I'll get right back with you.