I bought my router plane a few years ago and I dont remember spending all that much but I have noticed that router planes are going for quite a bit. I keep an eye out, you never know and lucky me I got a Ohio tool 71 1/2 for 40 bucks! Well 50 with the shipping. It's an exact copy of the Stanley so I'm pretty happy. Nothing wrong with a 2nd plane right? Lol.
But seriously, was there something in a magazine at some point? I cant believe what these sell for.