If you want to sell your knitting choose quick and easy things to make.
Remember that clothing is a big seller - just check out the large number of clothing stores at any shopping centre!
Fashion accessories are popular. Try making: hats, gloves, socks, scarves, shawls, bags, belts, slippers and even knitted jewellery!
You've got to price it right! It's a fine line between being paid for your valuable time and being realistic. If there's the same product nearby for half the price guess which one will sell!
If you want to be paid properly for your time then your product needs to be unique in some way. Stamp your individuality on each item that you make.