I have been in the game 30 years. I have had more than my fair share of "I will be ordering 100's or 1000's of shirts". I was new and young and stupid once and it only took one "SAMPLE" that didn't produce an order for me to change my policy. I charge a flat fee of $100 for one plastisol printed sample up to 3 colors and 2 locations. I charge $200 for one plastisol printed sample for 4 colors and up. If there are oversized prints, specialty inks, more than 2 locations etc., I charge more. I charge this with the understanding that this cost will be deducted from the total "WHEN" they place their order. I also only make changes to digital art proofs and "WILL NOT" print an inked sample until the customer approves the final art. Unless I have an order in hand I even charge an art deposit with limited changes and I do not send native files or high quality or images that aren't watermarked. I had more than a couple of instances where we did art and sent proofs only to see the shirts around town. If they want changes after the sample is printed, it starts all over. These policies eliminate tire kickers, scammers, people who want a custom one off and customers who intend on only ordering a few shirts. This sounds terrible but in my years in business I found out real quick that the general public will try to take you every way they can and the all have a one sided view. I have had some tell me my price and policy was ridiculous. My reply has always been (Not that I even owe an explanation) this is my job and my livelihood. I expect to be paid for the hours I put in. If you expect me to do my work for free it is the same as if you went too your job and the boss told you that you would not get paid for that job. Simply, you would quit. You are also telling me that my time is not worth anything. Nine times out of ten when you put it in that perspective, that is when they understand.