If you can spare some time in the early hours they would be well spent at bootfairs. There are many bargains to be had, particularly on items you are prepared to spend some time cleaning up and maintaining. Then advertise the items for free in the local paper or on eBay.
You won't make huge amounts but you'll soon learn what will give you a decent profit.
You won't make huge amounts but you'll soon learn what will give you a decent profit.