Is ps vita worth it?

I have a psp 1000 or 2000 but i want a ps vita and want to know more information.

Here are some questions:

• what should model of os vita should i look for
• whats a good price range
• how to test stuff like stick dift
• also how good is the repairability since in psp its easy to replace something like a stick.

Also if anyone used moonlight and played hollow knight and cuphead i would love to know the experience.

For me personally it seems like an amazing devices but i will probably find it used and it can have issues like stick drift which scares me a bit. Since my psp has stick dift.