1 I like the regular market place.
2 I always leave a donation if I make a sale and would prefer it to stay that way. I guess though that some don't, so I understand the need for a fee. My donations
have probably amounted to more than the suggested fee .
3 the bump button would work, although not sure if it's necessary really
4 good idea
5 the seller should be free to give what details they want to. If they don't then it's their problem and the item may not sell or if it does, then may be not for the best
price.