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Prunnys are not the 'in' thing as of now, hence the huge price drop. Your best bet is to invest in RIGs, REIs or even the latest EI (which is Prince of the Sky or something xD). Like what Sparta stated, it's going to take some time to sell the ones you've bought.
Last time I check, they're selling for 585k-ish in the MP. Either cut your losses and sell them lower or prepare to be stuck with them for a while. That is, if you've bought them at a higher price than that.
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