I'm trying to earn coins but don't know how much to sell my pets for? I'm selling Lunemaras, Qitaris, Ryoris and Zolnexis! I price them around 500 to 2k but don't know if that's too cheap or too expensive, I'm selling rainbow mane and storm mane Quitaris for 500 to 1k but seems too cheap to me since I seen people selling them for 10k or more

pricing of pets depends on many factors, and generally it's not a good way to make gold unless you're selling project pets and/or themes people want.
(factors that impact prices include if it's unthemed or themed, if themed then if it is one desirable to people, and if it's gen1 or purebreed, the stats, the traits)



for making gold see
Guide to Making Gold
guide to mission pets and missions
While it's still open, doing rounds of the fest zone collecting chests as they spawn
(what is your main party? Having a well set up team makes life easier)