Looks like that corner was already patched once or is that a different one?
Biggest possible issue is the age of the plastic and the center brace.
My 55 was used and it only took 2 years before the center brace cracked and the glass started bowing..
Now it's empty..
Stand looks nice..
If cheap enough.. winter project to learn how to re-do a tank..or just for the stand..
You'll need to probably replace all that plastic moulding..or you should.
PETCO used to include 55's w/ their $1/gallon sale.. Not anymore AFAICT. ($69.99)
Looks like their removed 40B's as well..$49..