You can anticipate paying ~ $1.00 p/gallon for the tank only (new). Lights and lid are the main expense often costing more than the tank itself, especially for top-quality bulbs. Stand ranges from $50-$250 depending on if it is rod-iron or wood.
If you plan on using the tank as a viv, is hard to say that the “fish stuff” carries any value unless it includes pumps, heaters, or quality water filters that can be put to use.