Funny, any thread that you have started and got caught up in your little Grab, you have ended it by announcing that you already found the material that you were looking for.
Just so you could get out of it rather gracefully. I don't believe it.
However, it is too bad that you ended up in this position, because there is a lot of knowledge here and very generous people.
For a start, I always try and include enuff extra to pay the Pay Pal fees. And if it is a special favor, I always include extra to buy a gallon or so of fuel. Ya know, people have to use a vehicle to run to the PO, time, packaging etc.
I have often wondered if I have actually given enuff. Sometimes, it isn't about the actual cost as much as the thought behind doing favors.
But come on. When you can't even reimburse someone for postage. You get a good deal once, but then, that is probably the last time they will feel like dealing with you.
I would rather try to keep the good will going.