[mothered]

Are store recommendations for SEi'ng watches/jewellery?

Stating the obvious, Amazon.

Is there a value limit you recommend to stay within?

For the most part, It depends on your account's standing.

To play It safe, I wouldn't exceed 5k.

I'm assuming Se'ing watches/jewellery worth >20K would require going through an ordeal.

Absolutely.

Expect a very lengthy Investigation with a high degree of complexities.