Also if you need a tank, just monitor the sale ads @ the pet stores every week or 2. The 2 largest pet store chains, have new sales all the time.
Also they do have unadvertised in store specials/clearance items.
There's so many options for tanks out there. Should be at least 100 different styles in the 2-5 gallon range to pick from.
You could also create a custom setup with a nice crystal flower vase if you have the other components, heater/filter/light.
Those rimless tanks are cool, but I think most tanks should have some form of lid.