"feel invaluable" is correct and usable in written English.
It means to have a strong sense of worth or importance. You can use it when discussing someone's sense of self-worth or the value they bring to a situation. Example: "She always strives to do her best work and often feels invaluable to her team."
She found the experience invaluable.
"There is no question that it is invaluable to feel radiant under someone's gaze," she said.
I mean, when your finance-mongering boyfriend cuts your allowance in half and starts insisting that you give up your reservations at Jean Georges (and let's not even discuss how he made you postpone your upcoming holiday), commiserating with women who really feel your pain is invaluable.
Some mothers felt more comfortable discussing distress on a one-to-one basis before being comfortable in groups, but many women found that discussing experiences with others in a similar situation was invaluable, 'to feel like you're not the only one who's completely mad having a baby' (participant 5).
Being able to draw on previous experience and background knowledge was felt to be invaluable.
One of his greatest skills and accomplishments in life was making every person he encountered feel special and like an invaluable contributor to whatever task was at hand.
It's clear, then, that writers now feel that social is an invaluable tool.
"Finding that space in Chicago that let me feel comfortable was, thinking back, invaluable and very cool," he says.
Nevertheless, we feel that the few but invaluable families harbouring single gene defect mutations related to ASDII do represent good contact points for researching the root of human septal development.
That's something I struggle with because I feel like it's a really invaluable lesson, but I'm not sure how to get it across.
