Cost of a business tax return - Sydney Australia.?

I'm in full time employment but an a consultant on the side, having my own pty ltd company. I've been having my personal and business tax returns done by a 'city firm' for years. Last financial year I was thinking of finishing my company, so perhaps had 2 sales, in any event, not much work was required by the accountant. I complete my own BAS statements.

For doing my personal tax and business tax, the firm hit me with a $2850 (ex gst) bill. The only thing they did during that year outside my visit to get my tax done was check 2 BAS statements, each would have taken minutes to do.

Have I been charged too much? How much is a reasonable amount for a city firm?

Thank you in advance.