Aluminum frame aquarium stand, front and back 2-tier, stepped, tiered, black anodized

I DIYed a two-tier stand for Super Clear Acro 90S Slim (90x30x36cm) using Misumi aluminum frames.
In the end, I placed the Acro tank on the lower tier, and used 60cm standard and 30cm cube tanks on the upper tier for about a year.
I'm selling it because I've reduced the number of tanks.

The total cost was close to 100,000 yen including the shelves.
The black anodized frames were scratched when they were sent from the manufacturer,
and I also scratched them during assembly, so there are scratches all over.

Overall dimensions: Approx. W960 x D660 x H930mm (including shelves)
First tier: Approx. W960 x D330 x H530mm (including shelves)
Second tier: Approx. W960 x D330 x H930mm (including shelves)

The shelves are made of 29mm thick decorative boards.
The shelves and aluminum frames are fixed with M3 screws,
but four screws cannot be tightened because the positions of the T-nuts were misaligned.
The aluminum frames are 30x30mm, and a mix of pre-inserted and post-inserted nuts are used.

It can be disassembled, but I cannot provide assembly instructions, so I will first list it using Pack & Ship Mercari (a shipping service).