Always buy under spot. Unless it's an eagle. I buy all silver for 10-15% under spot. If they won't sell it to me for that I'll just wait for the next guy. Not like there isn't plenty out there. Usually when I say that to whom I'm buying from and they aren't happy I just pick up my hundred dollars bills off the countertop and say thanks for your time and start to walk towards the door. I've never made it out of the building without silver in my pocket. They always cave.
You need to supply more information: 1) Why are you buying? (Do you want physical possession, or just to own silver?) Assuming you want physical silver: 1) What type of silver? bars? rounds? eagles? 2) What size do you want? (100 oz? 10 oz? 1 oz?) 3) How much do you want to spend at a time?
Louis Winthorpe III: "[approaching the New York Commodities Exchange] Think big, think positive, never show any sign of weakness. Always go for the throat. Buy low, sell high. Fear? That's the other guy's problem. Nothing you have ever experienced will prepare you for the absolute carnage you are about to witness. Super Bowl, World Series - they don't know what pressure is. In this building, it's either kill or be killed. You make no friends in the pits and you take no prisoners. One minute you're up half a million in soybeans and the next, boom, your kids don't go to college and they've repossessed your Bentley. Are you with me?"
Don't get hung up on spot. It is better to pay $32 when spot is $30 than to pay $33 when spot is $35. Lower is better.