Definitely not a merchant food... Seen a couple of req 7 AL15 shields go for 10-50k over the last two weeks. Try s/o 10k, leave it running for a few days and see how it goes...
gold does make it more rare but as its 15al i don't think it will make that much of a difference, but it might. as the above posts said put a s/b of 10k and see how it goes