I have a Stim up for grabs. I used this 2yrs ago so I know it works.
It was built by wilkingj on here.
£40 posted to the UK.
link to pics in google photos:
https://goo.gl/photos/v8Ah7am6A3nugjU19
Also I have a Relay board (and casing), again built by wilkingj, this I never used.
£60 posted to the UK
link to the pics in google photos:
https://goo.gl/photos/u3BP621cLXs42Pyt5
Both sold.