The 51-year old ex-marine said he is “incredibly desperate” to leave the US and return to Scotland, but admits people may be reluctant to donate money to him.
Despite that, he has started an appeal on the crowd-funding website Go Fund Me, saying he “had to ask” for the cash.
His appeal was launched in January and has so far raised 450 US dollars (£308) towards a target of 2,000 dollars (£1,371).
Richey spent 21 years in a US prison awaiting execution after being convicted of murder but was released in 2008 under a plea deal when a court determined his lawyers mishandled the case.
On the website he states: “After 5 heart attacks and 1 stroke, I find myself almost 40,000 US dollars in debt, with no health or medical insurance and no income. I can’t pay for my heart medication. I am now homeless and desperate.
“I spent 21+ years on Death Row, waiting to die in the electric chair for a crime I didn’t commit. I won my freedom in 2008.
“I have had a hard time trying to adjust to the norms of society and do not know how to function properly. I need medical care and treatment but can’t afford it.
“I am trying to return home to Scotland, where I would be better able to get that care. I am a 51-year-old man with nowhere to live, struggling to survive. I need help as quick as possible.”
He told the Stephen Jardine programme: “I want to come back because it’s my home.
“It’s my home, it’s my country, I wouldn’t mind finding some place quiet, maybe out in the countryside somewhere, away from everybody, I’d be happy with that.”
Richey, who said he has a girlfriend in Scotland, added: “It’s my home, I’m dying, I want to die in Scotland. They gave me two years to live six years ago. I just want to come home.”
However, he said he did not think many people would help him, saying: “Everybody in Scotland has made their bloody mind up about me, they always look at me like I’m a piece of trash or something, that I’m scum. They don’t see the human side of me.”
He urged people to “walk a mile in my shoes, live the kind of life I’ve lived, live the pain and misery I’ve gone through” before judging him
“I feel very bitter towards the system, how it’s treated me, what it’s done to my life,” he said. “I’ve lost everything, I’ve lost my youth, lost my health, and life sucks.”