Yeah, $65 does sound like a lot. I'm not perfect on my pony-pricing, but Cranberry Muffins can go for $10 or much more, Princess Tiffany is $5-ish, Wildflower is $5-ish, Speckles/Bunkie (can't remember which twin is purple) is at least $5, Dibbles/Nibbles (again, can't remember which one is pink) is maybe $3-ish, Baby Tic-Tac-Toe is $5-ish, Baby Ribbon is maybe $1-ish, and Lucky is $3-ish. (Lots of -ishes in there . . . ) I'm not up on accessories, so there may be something nice in the accessories, like maybe their original combs. And Lucky does have his bow-tie, which is cute. I guess maybe $40 for the lot plus shipping would be more fair than $65?
A lot depends on condition, too. Tiffany might be yellowed (not sure if it's just the picture) and Cranberry Muffins' hair looks a little poofy. But if these are ponies you're looking for and you can verify their condition, I'd offer $40ish if you can.