What needs to happen in these cities is some auditing of the second hand sellers. Pawn shops are required by law to record all items that they purchase but many of the people advertising and selling online are moving larger volumes of product with zero accountability.
The Kijiji and Craigslist type sites have mostly been allowed to operate in a gray area but there is no doubt they are facilitating the buying and selling of stolen items and as such a percentage of their profit is actually subject to seizure through proceeds of crime legislation.