WTB: PSA 10 Raichu Classroom Participation Promo (BW-P/152)

I’m looking for the 2012 Classroom Participation Raichu in a PSA 10, or mint raw condition. I’m hoping to pay £350 via PayPal for the slab, not sure on a price for the raw version, not including postage. Obviously open to negotiation.

First time posting so let me know if I’ve done anything wrong.