I bought a couple each of the 14ga, 16ga, and 18ga blunt needle tips when I first started DIY. I found that the 14ga were my preferred ones, so I then bought them in quantity, because I also share some with local new DIYers and friends, too.
Thanks for the further info (PG/VG/blunt needles etc). I may end up getting blunt needles/bottles from ebay, maybe even China based. Super cheap (like $4-5 for combinations), how badly can you screw stuff like that up?