Freshwater fish (Detroit Lakes)

Mr Potato Head is looking for a new home.
He is a freshwater thalassophryne amazonica.
They are venomous on the spikes on their tail, but he doesn't move much so nothing really to worry about.
Just don't intentionally touch them because it would hurt.
Currently eats small guppies and any other fish that swims above his mouth.
He comes with his 3 neon tetra tank mates that he hasn't managed to catch (they've been with him months) and I'll throw in some guppies to get ya started.
Could also throw in a couple Magenta Mystery Snails for extra action in the tank if wanted (pictured last).
He doesn't need a big tank due to not moving much (he's also only 3-4in long) and is currently housed in a 6 gallon cube with sand (they like to burrow).
I'd potentially trade for aquarium plants or dwarf shrimp (fire red or Goldenback) of equal value.
He's a pretty cool dude, but I'd like to downsize my tanks.
Asking 50.
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