A photographer friend of mine is selling his astrotrac and iOptrion skytracker as he is downsizing and stopping astrophotography due to age.
I don't have prices, but if anyone is interested let me know and I'll get you in contact with him.
The iOptrion skytracker is for wide angle lenses, less than about 100 mm. I have two of them. Very simple and works great.
The astrotrac is a very portable and accurate tracker. I have two of them. This is my setup:
https://clarkvision.com/articles/portable-astro-landscape-wildlife-setup/
I use mine at up to 600 mm (300 mm f/2.8 + TCs). Many of the images in my astro gallery were made with an astrotrac:
https://clarkvision.com/galleries/gallery.astrophoto-1/
Edit:
The Astrotrac comes with the Astrotrac Wedge, two Polar Scopes and that home made wedge for $850.00. The iOptron is $200.00. The Rokinon 24 f1.4 is $250.00.
Roger