However, about 10.45am today Mr Sharp received a call from Kaikohe police saying the missing wheelchair had been handed in.
Two children had taken the wheelchair from Waitangi wharf and were playing with it when their parents spotted then and demanded to know where it came from.
Thinking the wheelchair had been lost or stolen and dumped they took it first to Paihia police station, which was closed, then last night to Kaikohe police station, where they knew someone would be on duty.
Mr Sharp said he was "over the moon" to get his wheelchair back. He was planning to head back to Northland to collect it on Thursday.
The response he had received in the less than 24 hours it was missing was unbelievable, he said.
"It blew me away."
He commended the parents for taking responsibility for their children's actions, and doing what they thought was the best thing to get the wheelchair back to its rightful owner.