What is it worth?

i know you guys probably get alot of these questions but i have no knowledge in tanks and i am looking to sell mine. its only been up and running for about 3 weeks.

i have a 30 gallon tank. matching stand.

4 male guppies
2 snails
2 tank decorations
Net
Heater
Glass lid (has Crack.)
Light bar (has moon light works fine)
Filter
2 Sponges
20 lbs of rocks
PH tester strips
PH balancer
Aqua safe
Fish food
Snail food
Syphn