According to the search results, the value of a Mega Neon Cat in Adopt Me varies depending on the source. Here are some estimates:

• It is currently worth a little more than the Baby Basket Stroller.
• It is currently worth a little less than the Water Walking Potion and the Candy Cane.
• It can be worth a mid-tier legendary or 2 low-tier legendary pets, or 4 out-of-game ultra-rare pets, or 2 neon regular ultra-rare pets.
• It is about equal in value to the Egg Stroller.

Its important to note that these are just estimates and the actual value of a Mega Neon Cat may vary depending on the current market conditions and the preferences of the traders involved.