Hi
Nice finds !
I'm answering your PM questions here so all can chime in
I would most definitely go with the 60 cm high.

I have my (5) leucs in a 90cm wide - they love it!

I would not worry about the size of the enclosure. More fun ! It would have enough room to house more than one pair ( same s. I have 2 breeding pr of R imitator "varadero" in a 45cm x45cm x60cm. I have never seen any sign of aggression-- Both pair are breeding as there is plenty of room and a billion places for them to sneak off to.

As for the accessories--- just be certain they are in working order as I'm sure you are paying a lot ........or the extra stuff.
Make sure it's a misting system and not equipment that was used for a rain chamber? A misting system is really something you should have in these size tanks for darts- otherwise you'll get arthritis


Fogger? don't know ?......Keep in mind --- these little guys are escape artists ! Every opening that is made in the top has to be done very carefully. Otherwise they WILL get out !

I have all my darts in exo's--- ALL of the screens have been removed and replaced with glass. I suppose you could cover the screen with plexi ( cut to fit).
However when it's covered ---it rusts. I have rust on the screen tops of my tree frogs enclosures
The lower /back ( of my dart exo's) are drilled for automatic draining. I use mist system in all ( mist King) / no fogger.
The drilled / draining automatically - is SUPER ! I can't imagine them not drilled.

Hope this helps
Lynn