Hannah checkers

[Harry g]

Don’t know much about Hannah checkers bought these 3 with an ai prime for about 100$ I don’t have anything else but what’s shown in the pictures but they all still turn on when you click the black button, what would you guys sell them for?
TYIA,

 

[claydogg84]

With good reagents $35-$40 each. Without, $25 or so.

 

[Harry g]

With good reagents $35-$40 each. Without, $25 or so.

That’s kind of what I was thinking just wanted to verify, thanks!