Don't waste time looking for sales data for the exact model. Instead, look at similar bikes, with similar quality tubing, similar components, etc. Pretty much all the manufacturers bought parts from the same suppliers. At most, the only thing Miele built was the frame, and they bought the tubing from someone else.
I don't see much interest in the US for Miele bikes. Its a Canadian brand that gets a lot more love in Canada. Go to one of the Craigs List search engines, watch your local C/L for activity.
And a good portion of the value is how good of a job you do preparing and marketing the bike. Most bikes sell for less than market value for those two reasons. Its pretty hard to get full market on a bike.
If you want someone to take a stab at the value of your bike, post pictures of it, AFTER you have done the prep work. Those pictures will be required to sell it anyway.