Traders on Anglesey are to band together to decide how best to promote the three markets on the island.
Traders Rod Needham and Janet Rowbottom at Amlwch market
The traders, at Llangefni, Amlwch and Holyhead markets, said there was "significantly less" trade now in the markets than two years ago.
Their problems had been compounded, they said, by work carried out in the centre of Llangefni recently.
Anglesey Council said they realised things were getting harder and they had initiatives to attract customers.
"People don't look at the produce available at their local market, doing all their shop in the supermarket instead, but when we did a shopping basket test, the products bought at the market were much cheaper," said Noreen Needham, chair of the north Wales branch of the National Market Traders Federation.
The north Wales branch of the federation has 256 members and leaders are to meet next week to try to drum up ideas to attract trade.
"Markets have a bit of a cowboy image, but it's not at all like that, the market is regulated closely by trading standards.
"What you get at today's markets is a person who sells you produce they know about," said Mrs Needham, who is on the UK executive committee member of the federation.
Problems had been compounded for Anglesey market holders by work to upgrade the riverbank with a walkway and cycle track at Llangefni, she added.
Now that work has been completed the traders are hoping customers will come back.
Mrs Needham and her husband Rod run a flower shop in Llanerchymedd as well as the market stall.
"There is a lovely atmosphere here, we all help each other, and we have fun talking to the customers," he said.
The county council run both Llangefni and Holyhead markets while the one at Amlwch is run by the town council.
"The council places great emphasis on promoting these markets - the Holyhead market is only two years old and was started by the council in response to public demand," said David Owen, principle trading standards officer with Anglesey Council.
"We have however realised that things are getting harder for the stall holders with competition from the supermarkets and we have been organising events such as children's entertainment, to attract people to markets," he added.
Anglesey stallholders will join others from all over the UK in London next month to lobby MPs to back their trade.