Check this link: http://www.vintagelensesforvideo.com/helios135mm/
Dark. Not sharp. A waste of time.
Works just fine.
Build quality: ★★★★☆
A very good workmanship. Everything is working perfectly.
Market value / value of subjective: ★★☆☆☆
Less than $ 10 is a very good price.
Here are some sample pictures.
They were made with Sony Alpha 300.
Pictures were taken with aperture F/5.6 ISO-100
All photos without amendment in graphics programs.