Even by the standards of Sydney's frenetic January sales the alleged spending spree was enough to leave the wallet aching.

In the course of just over a week, a 23-year-old Sydney man, Alexander Pollard, allegedly spent more than $37,000 in 80 separate purchases.

Alex Pollard in his Facebook profile photo.

But police say it wasn't the man's own bank balance bearing the burden.

The 23-year-old was allegedly using a credit card stolen from a Balmain resident, Karl Warkus, who had been the victim of mail theft.