Mac Duggal white sequin v-neck gown

This dress is very similar to the one shown by the model, but the front is slightly different. It doesn’t wrap across itself in the front like one modeled. It does look pretty much the same in the back though, and it has the ruffled shoulders. This dress is BRAND NEW WITH TAGS! Retails for around $600! This SAME dress sells for $325 on Poshmark. I am open to reasonable offers.