Nectar points are given at the rate of 1 point per £1 spent, and are worth ½p per point. So your points are worth £25.
That rate compares badly with Tesco's 1p per point (per £1 spent), with frequent offers giving double points as well. It's much worse than the Co-operative which, around here at least, gives 2.5p per pound spent.
it says you can collect on ebay. I bid on ebay earlier for a top and won through the link on nectar yet it hasnt registered the points onto my account?