Can i get a PC on Ectos, shards, and minis?

prices on birthday minis can be found in the minipet and tonic pricing guide at the top of this forum.
as a rule most of them will not go for much as the last new mini from a birthday gift came out 5? years ago---
as well as the tonics which did not go over very well, you might get up to 10plat for the keiran tonic.

and the -50 cesta is still available ingame so, not worth anything.

you can choose to agree or not, but anyone who can make a character in prophecies can get that item for free: https://wiki.guildwars.com/wiki/Cities_of_Ascalon
so my assesment stands.

Just because something is still available in game doesn't make it worthless. People will pay for the -50 health cesta to save them the effort of doing the quests themselves. This is a fact. The difference between buy and sell prices look significant so I don't know how much you could expect, but you should get at least an ecto or two which is certainly not nothing.

if ecto are going for 5plat then ok, but no one will pay more than 10k for it--not even 9 years ago.
The last time I price checked this, it was LESS than 10k (on a GOOD day in spamdan), which is just about worthless.

I checked the kamadan log website before I posted. There's no shortage of people offering 1-2e for them. Plenty of people trying to sell for 10e too, though I don't think anyone actually bought at that price unless they have more money than they know what to do with. Even at ~5k, there are enough people that want them that advising people to bin them is poor advice. Regardless, claiming that an item is worthless because it's still obtainable is fallacious.