i srd a flawless zapdos and traded it for a legit 5iv jirachi on this site. if youre willing to do the work, you can def get the pokes you want. that same zapdos has scored me flalwess shaymin as well :)
edit: i guess i should also add that while you may not care about the ivs, most of the people on this site certainly do, so you prob wont have much luck without some good trade value legends. itd be silly to not play a meta you want, just cause you dont have the jirachi. i felt the same way about ou and ubers cause everyones got flawless heatrans and lati@s, its a bit intimidating. but the few good SRs i did have allowed me to expand my collection enough to hang in that meta. embrace the grind bro!