Suspension service pricing ?

Try here. https://mx-tech.com/pages.php?pageid=5

And here. https://racetech.com/ProductSearch/12/KTM/250%20EXC%20Racing/2005

I think most places have estimated prices on rebuild vs revalve (plus oils and parts that need replacement).

example: https://www.enzoracing.com/our-services/

When you look into getting suspension serviced, look at their price and plan on also paying for:
oil
seals
bushings

It's in their best interest to replace all of those so that your suspension is working as good as possible when it leaves their shop.
A friend recently had his forks revalved and the prices was posted in the $190-200 range. His bill was $340 because of the 3 things above.

Afternoon All, I know for a fact that the 3 largest (to go unnamed) players in the suspension game replace bushings and seals regardless if they are worn out or not. This isn't merely an attempt at them to make more money, but to ensure that their job is protected my new, high quality parts and that you get the best out of your hard earned and well spent money. For any service, if they advertise $150 bucks, you bet your butt you will need to tack on OEM bushings, seals, and the best quality oil there is onto there as well to get an accurate number. Unfortunately with KTM's, suspension servicers typically tack on an extra $50/side due to special tools, extra build time, additional measures. To answer your question, estimates are below;

Forks - $250-350
Shock - $200-300

Seeing that it appears you're SoCal local, worth a call to these guys: http://www.ahmfactoryservices.com/

They're straightforward with quality service; Probably even give you a ballpark over the phone.