Yes, sports arbitrage betting is 100% legal.
All that you are doing when you engage in sports arbitrage trading is placing a series of bets on opposing outcomes of a sporting event, which happens to guarantee a profit. Therefore there is nothing remotely illegal in arb betting.
Arbitrage is also popular in other contexts such as stock markets and Forex (foreign exchange / currency markets) where price differences can be exploited to guarantee profitable trades.
Back to our sports arbitrage frequently asked questions.
We are a sports arbitrage service provider offering:
"I have only subscribed for a few weeks and I think your service is absolutely first rate and very reasonably priced.
Your arbs are plentiful with your more unusual selections seeming to go unnoticed by the bookies and thus are available for lengthy periods.
Also I have had cause to email you with a couple of queries and your replies were prompt and to the point."
Mr G, Blackburn