OP registered at Sept 2020, if im the seller, im not selling to you either, afraid of not shown up...Also OP you need to check what is the meaning for Scammer...   

In fact seller can report police for defamation, since you accused him/her for Scammer, but in fact he just sell to higher bidder, which is kinda unethical IF he promised you but cancel in the end... but no where near the level of Scammer , because compare to people who actually lost the money to scammer, you only waste some time plus some data by enquiry the seller