Bought my last one a year for 60€ which seems just about right to me for what it is but of course there are enough rich and crazy people who are happy to pay whatever someone else is asking it seems.
Had to buy a new one because the one i bought back in 1991 cracked which is ok after all that time but on the other hand i've got a lot of this stuff from that period that still does its work.
If i would be inpatient which i'm not i maybe would pay up to 80€ for a good one if i have to have a new post imediatly.