Thank you! These choices seem absolutely fascinating! I'd also love to learn more about the pricing for them.
This is what I'd consider fair for a small frag, prices obviously vary by frag/colony size, vendor and geography. You'll get the best deals at local frag swaps/shows
(nearly) Impossible to kill
Green Star Polyps $10-$25
Clove Polyps $20-$35
Xenia $10-$25
Easy
Candy Canes $15-$40 (varies by color with "neon green" generally being the most expensive)
Micromussa $25-$50 varies by color, more vibrant being more expensive
Zoanthids $5-$25 per polyp, again more vibrant = more $
Intermediate
Torch $25-$100, varies by rarity/color
Hammer $25-$75, varies by rarity/color
Montipora $25-$50
Bubbletip Anemone $25-$100+, standard rose is going to be cheapest, followed by rainbow or green, and can go way up from there depending on "breed" (sunburst, black widow, etc... I'd start with a rainbow in case of mistakes/death as you learn)