2014 Prius: Check Hybrid System + P2118 after sitting a month

Dealerships probably needed. FWIW, check this link, see what it shows for throttle body cost to you:

Genuine Toyota 22030-37060 (2203037060) BODY ASSY, THROTTLE - Amayama

For me in Vancouver, BC, Canada it’s $607.11?CDN plus ? for shipping. From past experiences I’d guesstimate $35 CDN. Not sure if there’s some ceiling, but so far for me no extras, say sales tax or duty; quoted price plus shipping is all I’ve been charged, with items up to maybe $150 CDN total.

 

What are the "remedies" you have attempted?

You have a trouble code that is fairly specific as to the possible locations of the problem. Replacing the throttle body itself is unlikely to do you any good. Have you followed any of the troubleshooting steps specific to the code you have?