For people asking about online sellers- honestly, if it's new ammo, I've never really had a problem with anyone and it's always been about best price with shipping. I DID have an order from Selway, where the box got tossed around by the shipper and it busted a couple boxes inside... but a quick email and they gave me a bit of a rebate. I've bought from a bunch of different sites, using a credit card. If you use a card, you have the safety net of disputing a sale if need be, and I think that has prevented scams.
For reloads, I've had good luck with Freedom Munitions, Fenix sent me a case this summer, and I've used a couple others. The ammo all seemed ok. Trying to remember if I've used any LAX reloads; probably not in 9mm, since they cost a bit more than the market. But I wouldn't hesitate if they were my only choice.