I've purchased from a few guys, but only one has given me the most outstanding service and it's them I purchase from regardless of the price. It also helps that they are a major discounter and that their prices are consistently among the lowest.
My orders are processed and shipped almost always the same day. They are not too far away so UPS gets the package here in three days, but recently, for their standard shipping, (probably due to the holiday rush) packages get from Baltimore to New York City overnight, for the standard 5 to 8 dollar shipping charge.
To me, service is worth a few extra dollars.
Edited to add...
:footinmou You know... the part of the price and purchasing exclusively isn't true... I was just sitting here when it hit me... "what a crock of (stinky stuff) I just wrote". I was just contemplating buying a a British survival knife from another dealer who sells them for about $20 bucks less.
Okay, the truth of the matter is, I buy from whomever floats my boat at the moment. At times, it could be anyone as long as I feel that they're reliable. I'm a majorly impulsive buyer and I'll pony up extra money, and sometimes a lot of extra money if I can have what I want, when I want it. Otherwise, if I can wait, I'll get it for as little as I can, from someone who is reliable. And, yes, 1sks does get extra consideration because of the forum, but the dough gets spread around.