Local councils will benefit as they can divert bulky waste from landfill by donating items to the Bodmin-based store be resold and reused.
An open workshop at the back of the complex allows shoppers to see donated goods being cleaned, refurbished, safety checked and tested before they are resold in the shop.
However, its store managers have been surprised by the high quality of goods donated by local residents. Many items are modern and nearly new and designer items are also available.
The not-for-profit project also offers training for local people, which includes trades such as carpentry and electrics, administration and sales skills.
Mayor of Bodmin Michelle Griffiths said: This type of facility has been a recognised need for a number of years with many local councillors and officers actively involved in the resourcing and recycling of household items for the benefit of the homeless, amongst others.
"In a society, often accused of being wasteful, and with the growing public awareness of pollution, landfill and global warming, I very much welcome the Re:source centre.
Centre project manager Jon Rolls added: Seeing the building complete, with items being refurbished and products ready for sale is very satisfying and is the result of many people and organisations working together.
As a not-for-profit organisation Re:source will be reinvesting income back into initiatives that tackle waste production and address local disadvantage.