Return of token amount

Ideally holding or forfeiting the token depends on Strength either of the parties 

for not giving back d token amount the prospective buyer can 

go to police , politician or court (warning but matter will not stand )

Police too will say its civil matter 

Only mistake u made that u shared the property docs with him 

that will prove relation between both of u if he goes to police

even though civil matter they will interfere 

best is to make an settlement

The payment is by bank transfer, thus can be proved.

It is better to negotiate and close the matter. You must pay by cheque and obtain acknowledgment of payment.