Im thinking of starting an Oscar tank and was wondering if one oscar (or 2) would fit in a 20 gallon tank? If so, does anyone know a website that sells 20 gallon tank kits at a reasonable price (not over 130-200$)?
I wouldn't put an oscar in any tank smaller than a 55 gallon, personally. Others may have other opinions about a minimum size. 20 gallons is definately too small.
Have you considered checking Craig's List? For that amount of money I will bet you could find a lot more than a 20 g tank. I bought a complete 30g set up with a nice furniture stand for $100. It was very nice so I didn't even try to deal.