Just take a friend with you, most criminals give those great deals on cars and electronics, never heard of a CL violent crime that involved an aquarium.
Id have to look hard at the 135 with the busted bottom because that is going to cost about $200 to DIY fix. Id offer $135 for the 135 gallon that works. For the works if you want it Id offer $250 cash. $500 is a bit much for fresh water stuff IMO.
I missed the two 90's so Id offer $350 tops for everything.