Hi McGroogle, don't show interest, don't buy in the first few days,sus out the places that sell the type of things you would like to buy,start at 1\4 of asking price, walk away to next shop if need be,always smile & be polite, follow mrstella's advice on diamonds but if buying ready made you can try a little haggle if you win don't let that stone out of your sight they can swap a stone in 30 seconds

trust me I've led a very sheltered life