Hello,
You can use this website for car values: https://serviciosnet.hacienda.go.cr/autohacienda/
As for other goods, will you be shipping on a container or buying abroad and sending to Costa Rica?
I suggest talking with a lawyer if you plan on picking things up from customs here in Costa Rica. I love to share my lawyer's contact info: https://themislegalcr.com/ or you can send a WhatsApp here: Rosa +506 8831 2261
Are you a resident? If you are getting your residency, do you know about his Law? Costa Rica's Law 9996 allows qualified residents to import up to two vehicles duty-free for personal or family use and a one-time exemption for importing used household goods and personal effects. It's only in effect for another 2 years I think, so might be something important to consider if you want to bring a car and goods into the country.
-Bekah Bottone, IL Costa Rica Correspondent