I've not bought from Lost Creek, but often times the extra you pay "for the same item" is actually paying for somebody to open the box and reject those with obvious defects, somebody properly packaging the item for shipping, and then somebody answering the phone / email if you have a problem.
Example for me being a dividing head from Precision Matthews. Matt at PM basically admitted that theirs is probably made in the same factory as the cheaper ebay ones.
My experience was PM packed it in a heavy shipping carton and it arrived without incident. I've never had a need to test PMs customer service, but there are many examples of them trying to make things right.
Another poster bought the same dividing head off of ebay for maybe $100 less than I paid. Theirs was shipped in the lightweight display box which did little to protect a heavy (50lb) hunk of tooling from shipping damage. Theirs arrived with damage and they ended up spending weeks of back and forth with the ebay seller, before finally getting a refund, and then bought one from PM.
I've also bought from Little Machine Shop. Again, they basically sell the same import stuff you find on ebay, but it appears to me that they have people going through the inventory to do a second quality control check before shipping to the customer. They might even do a presale cleaning, because I've never received anything from them with the weird smelling oil or casting sand so common with import tooling.