A Belfast man scammed almost £250,000 worth of goods from B&Q and sold them on internet site eBay.
Philip Dumigan used fake barcodes which registered a lower price when he brought the items to the cashdesk.
A judge said the 36-year-old, from Tildarg Crescent, had been involved in a sophisticated scam which had required careful planning.
Dumigan, a father-of-three, was jailed for three years and placed on a year's post-custodial supervision.
The fraud was carried out at various B&Q stores across Northern Ireland, Belfast Crown Court heard on Wednesday.
The goods amounted to £247,000 and involved 450 items, most of which Dumigan sold on eBay.
He was stopped in February last year by security staff at the B&Q store at Sprucefield on suspicion of theft.
Police who searched his home found a large number of power tools, showers and other goods.
The scam was carried out over a two-year period, making an estimated profit of about £100,000.