I’ve worked for a company that was barely using its /16. I know several individuals, including myself, with personal /24s.
None of which are any help when connecting to someone who doesn't have those.
A /24 is currently worth between $5,000 and $9,000 USD. Did you get them a long time ago?
I recently released a /24 that I registered in 1992 and I hadn’t realized it was still mine.
ARIN was gonna charge me $100 to authenticate and recover the account, but once I asserted and notarized my letter of relinquishment, the process went real quick!