Sounds like you have some good stuff there as well! I'm like that too...analyzing my purchases but, I want to also know I'm getting the best deal yanno? My boyfriend is ALWAYS telling me "do your homework honey!" he's right too. I can't tell you HOW many times, if I just take the time to search a little, that I end up finding something either at a better price or more of it for less money.
Let me know what white ink pad you go with. I have 2 and they both STINK! One is Stazon opaque in cotton white...AWFUL!! and the other I just bought not too long ago and it's awful as well! it's called versamagic multi-surface chalk ink in cloud white. Looks absolutely TERRIBLE when stamped. I've ruined cards trying to use them. I'm very disappointed.