Ok, just trying to get my head around placing lay bets and this didn't seem right to me.
Just watching Sunderland vs Tottenham and looking on the correct score bets...
There is a currently a Lay available for a final result of Sunderland 3-0 Tottenham... odds of 400.
If I lay this at £2, my liabilty is £798, Payout would be £800.
So if I put £2 on this and it's not 3-0, I get £800? Is that right? But if it did actualy happen I'd lose £798?
By laying the 3-0 at 400, you are offering odds of 399/1 and you're saying you will only take £2 on that price. So if the score was 3-0 you'd pay out £798. Any other score and you win £2 (minus Betfair fees)
To win £800 (£798) you'd need to BACK the 3-0 with £2.