This is covered in the forum rules:
So the advice is to check sites like reverb, ebay, and basschat for similar current/previous listings.
E.g.
https://reverb.com/uk/item/81547069-squier-matt-freeman-signature-precision-bass-2012-2015-vintage-white
https://www.basschat.co.uk/topic/461107-sold-squier-matt-freeman-precision-bass-vintage-white/
One thing to bear in mind is that the asking price seen in adverts isn't necessarily the final sale price, as the seller might have accepted an offer.