I wouldn't charge less than $200...
Think about the value you're providing to the client. You're (hopefully) saving them tens of thousands of dollars or more in current year tax liability by deferring gain to future tax years. Hopefully you were the one that brought this strategy to their attention and referred them to a qualified intermediary. With your help, they could keep 1031ing up and eventually pass down to their heirs at a stepped-up basis and avoid income tax on the gain altogether.
In that situation...and this may be a little entitled of me...but I think you deserve more than $200... That seems like seasonal strip-mall joint prices where they crank out 1040s and have per form pricing.
Again, internalize the value you're pricing in the fee. Let the client know, yes, the fee is high, but this is how much tax we're saving/deferred by implementing the strategy we've discussed.