Can they collect an old debt?

Which company sent this letter?

This must be a Pure Junk Buyer as opposed to a company who also maintains a legitimate debt collection practice like our company.

I'd say that if your debt was for $1,000 the company purchased the debt for $10.00 to $15.00 tops.

We don't buy any debts older than 12 years old and most of our Junk Debts are 7 to 10 years old. The sad thing is we are able to sell them in the event that we give up on collecting. It's amazing this Junk Debt World. It is so easy for a legitimate company to make some extra money off Junk Debt because our worst case scenario is spending $50 on the debt then selling it further downstream a year or two later for $35-40. So, if we collect on so much as 3.5 percent of our junk debt accounts at 10 percent of the amount of the original debt, we turn a profit on junk debts. Right now we are actually collecting on about 14 percent of our junk debts.