Police received three complaints from residents of Recreation Road about a man knocking on doors between 5pm and 6.30pm on Friday.
He was selling items including tea towels, oven gloves, dusters and clothes but he also asked residents for money and tried repeatedly to enter their homes.
Police described the suspect as Asian, black or of a mixed race, in his thirties or forties, 5ft 7in to 5ft 10in with black hair. He was wearing a red and grey bobble hat, a dark waterproof jacket and jeans and was carrying a large black holdall. Call 101.