Hi all, I am looking for advice please....is it worth buying btc at a lower rate on sites like localbitcoins.com and selling them on at a higher rate? Is it worth doing and is there actually money to be made from doing this please? Any advice greatly appreciated, thanks 
The answer to this depends on various things. If buying for a lower amount than bitstamp, and selling on lbtc itself, then yes it is definitely profitable. It will also be profitable if an exchange price is higher than the price you purchased it at. The only problem is in times when the volatility is too high and you happen to purchase a large amount of bitcoins. During then, due to the swings in the price, you might have to also face swings in the total profit and could go in loss as well. But if you can trade large volumes, then its definitely profitable.