The phrase "may be invaluable" is correct and can be used in written English.
You can use it to talk about something that is potentially very valuable, useful, and/or irreplaceable. For example, "The advice from experienced professionals may be invaluable in helping you make the right decision."
Potent, broadly HIV-1 neutralizing antibodies (nAbs) may be invaluable for the design of an AIDS vaccine.
Such models may be invaluable as expressions of opinion, but without empirical data to support them, they remain exactly that, opinion.
The long range civilizational perspectives which East Asia holds may be invaluable in reorienting societies toward long term sustainable policies and practices.
The increasingly sophisticated suite of biocomputing nanoplatforms may be invaluable for a multitude of applications, including medical diagnostics, biomedical imaging, environmental monitoring, and delivery of therapeutics to target cell populations.
Objective: Preservation of the supratrochlear vascular pedicle (SVP) during use of the paramedian forehead flap can be accomplished by the aid of Doppler imaging; however, a reliable surface landmark may be invaluable in cases where Doppler examination fails.
Stocked with antiques that barriers prevent you from studying up close and dimly lighted in the interest of historical authenticity, they may be invaluable for decorative-arts wonks, but they can't compete for popularity with the Impressionist and Ancient Egyptian galleries.
CRP may also be invaluable in the management of neonatal sepsis in resource poor centres where facilities for blood culture may not be readily available.
If he did, he would know that the internet is terrific for this, and may even be invaluable.
But while glamour and froth may well be invaluable commodities in the world of fashion, Sykes has a reputation for being a hard worker, and it seems unlikely that this is all there is to her.
The fact that the results obtained with C. elegans appear to have strong similarities in human beings suggests that not only will C. elegans prove an invaluable model for understanding the fundamental biological changes seen during spaceflight but that it may also be invaluable for understanding those changes associated with human health concerns in space.
"Even if a particular player doesn't generate impressive individual statistics, he may still be invaluable in a game if the team tends to perform much better when he's playing," Davenport writes.
