Good deal/Bad buy it's all relative to your area. Sure the general rule for used tanks is $1 a gallon but if it is the cheapest you have seen in your area then it is a good deal for your area. There will always be a better deal somewhere.
Exactly right!! All depends on where you live. For example, where I live you can buy a brand new 20g with absolutely everything in it, including food for about $40.00. That's canopy, lights, gravel,nets, filter, cheesy decorations, air stones, water conditioner and heater. The whole enchilada!! I thought that was a pretty good price.
Whereas I know in the UK and Australia their aquarium prices including fish are exorbitant!