$50
The original price was $88 with tax when I bought it last Oct.
https://www.amazon.com/gp/product/B07DTTGZ7M/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&th=1
I used this just a few times.
If you are interested, please email me (kimkevin@stanford.edu)
Please do not message this poster about other commercial services.