This is a really popular term (about 27 million Google results for me) with clear commercial application. I see that the .com is in use and the .net goes to parking/sale page.
While the .io extension has more adoption in tech than in general commerce, well over half the sales this year seem outside tech. There is no doubt it is a strong name. I looked through the .io 2018 list to try to find a comparator. None super close. I think it is worth more than the $2500 cupboard as a similar length similar generic type word outside tech.
I was surprised how few sales there have been in the term, but the valuations are positive. It went for $2395 in .us, $12,265 in co.uk, and $6650 in com.au.
I really don't know the niche well enough, nor .io really, but would think something $$$$ range. Hopefully others can be more precise, and the best of luck with it.
Bob