Organisers of Gloucester Car Boot & Flea Market are raising money for the Zac Evans Trust.
Popular 19-year-old Zac was killed in an alleged machete attack outside a pub in Tuffley last month and a fund has since been established in his memory.
His death has left the city reeling in shock and hundreds have donated to the fund which has so far raised close to £5,000 to cover the cost of his funeral.
His family are hoping that in the long-term the Trust can support youngsters like Zac.
Tom Wiggins and other sellers at the regular Hempsted Meadows car boot wanted to give the Zac Evans Trust a boost.
Organiser Bob Newby and his son Evan have agreed to pay 50 per cent of the sellers' pitch fees on Saturdays to the Zac Evans Trust for the entire month of February.
"It's a small gesture" said Evan.
"But the more people who come to sell stuff on a Saturday, the more that the Trust will benefit.
"It won't cost the sellers any extra, we will just donate half the income."
Gloucester Car Boot & Flea Market ais no newcomer to charitable efforts.
Since taking over the running of the market from Gloucester City Council last October, organisers have offered a free pitch space to any registered charity.
Bob said: "It's our way of putting something back and maybe highlighting a new way that charities can be supported."
Zac's grieving mother Sylvia has said the "love and warmth" from people across Gloucester are what is helping her cope with the loss of her beloved son.
Staff at Gods of Ink are busy planning a fundraising event at the Market Parade tattoo studio from noon to 11pm on Saturday, February 28.
There will be a raffle, photobooth, hot food and live music and staff will be tattooing a small design in memory of Zac for a small donation throughout the day.
Ewen Anthony Reynolds, 44, of Foley Close, Tuffley, is accused of murdering Zac and attempting to murder his friend Keaton Jones, 22.
