Exactly, sadly you´re right. I didn´t remember that all mystery gift Spiritombs were shiny. So the only rare thing about it is the fact that it is a mystery gift which you can´t get anymore and that it has a custom move. So @Cow538: Sorry for the misunderstanding, but I don´t think they are of equal value.
I guess you could argue that for a more recent mystery gift, but this one was from 
Though, I’ll make a different offer @Mia
I have a shiny Rapidash, but it isn’t competitively viable (bad nature). I’d throw in 3 IV stones if you were interested in it.
Luckily I already have more IV stones than I´ll ever need. So it´s a no. Sorry!
Damn. Lemme post my boxes and you’ll tell me what you’re interested in, aight?
Let´s do that.
Wow, are all those Delta misdreavous shiny?
Yes, I went overboard on that mystery gift 
There was a shiny Delta misdreavous mystery gift? Darn…how tf did I miss it…
Interested in:
- Metang
- Aegislash
- Giratina
- Regigigas
- Eevee
- Kyogre
- Garchomp
- Tyranitar (Larvitar)
- Greninja
I don´t know which ones you are willing to give away. Could you give me information like nature/IVs/special moves of the tradeable ones?
Garhomp
Aegislash
Eevee
The other ones you mentioned I wouldn’t be interested in trading for the Servine.
Are you interested in trading the more valuable shinies if I add IV stones?
Possibly, but do you have any other shinies?
Not really, only Deino and Hydreigon (the mission 5 ones).
Would you be interested in trading the servine + a few stones for a shiny Careful (support set) Tyranitar?
You know what, I just looked through my teams and I think that careful Garchomp (the one you posted the picture of) would be a nice fit.
Okay. Can you trade now?
yes, want to see a picture first?
Sure. Also, what version are you on?